diff --git a/Sources/CMakeLists.txt b/Sources/CMakeLists.txt
index e0c8929..83d9fd5 100644
--- a/Sources/CMakeLists.txt
+++ b/Sources/CMakeLists.txt
@@ -119,13 +119,12 @@ if(CMAKE_COMPILER_IS_GNUCC OR CMAKE_C_COMPILER_ID STREQUAL "Clang")
 	add_compile_options(-Wno-unused-value)    # same here (the Scripts generate tons of unused variables and values)
 	add_compile_options(-Wno-missing-braces)
 	add_compile_options(-Wno-overloaded-virtual)
+	add_compile_options(-Wno-invalid-offsetof)
 	MESSAGE(WARNING, "re-enable some of the warnings some day!")
 
 	if(CMAKE_CXX_COMPILER_ID MATCHES "Clang" OR CMAKE_CXX_COMPILER_ID MATCHES "AppleClang")
 		add_compile_options(-Wno-tautological-undefined-compare) # don't complain about if(this!=NULL)
 		add_compile_options(-Wno-c++11-compat-deprecated-writable-strings)
-	else() # most probably GCC
-		add_compile_options(-Wno-unused-but-set-variable) # my clang doesn't know this FIXME: re-enable?
 	endif()
 
 	if(MACOSX)
diff --git a/Sources/Engine/Base/Stream.cpp b/Sources/Engine/Base/Stream.cpp
index 5e79967..d48f827 100755
--- a/Sources/Engine/Base/Stream.cpp
+++ b/Sources/Engine/Base/Stream.cpp
@@ -934,7 +934,7 @@ void CTFileStream::Create_t(const CTFileName &fnFileName,
   }
 
   CTFileName fnmFullFileName;
-  INDEX iFile = ExpandFilePath(EFP_WRITE, fnFileNameAbsolute, fnmFullFileName);
+  /* INDEX iFile = */ ExpandFilePath(EFP_WRITE, fnFileNameAbsolute, fnmFullFileName);
 
   // check parameters
   ASSERT(strlen(fnFileNameAbsolute)>0);
@@ -1317,7 +1317,7 @@ BOOL FileExistsForWriting(const CTFileName &fnmFile)
   }
   // expand the filename to full path for writing
   CTFileName fnmFullFileName;
-  INDEX iFile = ExpandFilePath(EFP_WRITE, fnmFile, fnmFullFileName);
+  /* INDEX iFile = */ ExpandFilePath(EFP_WRITE, fnmFile, fnmFullFileName);
 
   // check if it exists
   FILE *f = fopen(fnmFullFileName, "rb");
diff --git a/Sources/Engine/Brushes/BrushTriangularize.cpp b/Sources/Engine/Brushes/BrushTriangularize.cpp
index 51d16ad..ddb29c4 100644
--- a/Sources/Engine/Brushes/BrushTriangularize.cpp
+++ b/Sources/Engine/Brushes/BrushTriangularize.cpp
@@ -337,7 +337,7 @@ void CTriangularizer::MakeEdgesForTriangularization(void)
   // get number of edges in polygon
   INDEX ctEdges = tr_abpeOriginalEdges.Count();
   // create that much edges in the array
-  CBrushEdge *pbedEdges = tr_abedEdges.New(ctEdges);
+  /* CBrushEdge *pbedEdges = */ tr_abedEdges.New(ctEdges);
 
   tr_abedEdges.Lock();
 
diff --git a/Sources/Engine/Classes/MovableEntity.es b/Sources/Engine/Classes/MovableEntity.es
index 4a4a901..7bc441e 100644
--- a/Sources/Engine/Classes/MovableEntity.es
+++ b/Sources/Engine/Classes/MovableEntity.es
@@ -2863,7 +2863,7 @@ out:;
 
     _pfPhysicsProfile.IncrementCounter((INDEX) CPhysicsProfile::PCI_DOMOVING);
 
-    FLOAT fTickQuantum=_pTimer->TickQuantum; // used for normalizing from SI units to game ticks
+    //FLOAT fTickQuantum=_pTimer->TickQuantum; // used for normalizing from SI units to game ticks
 
     // if rotation and translation are synchronized
     if (en_ulPhysicsFlags&EPF_RT_SYNCHRONIZED) {
@@ -2878,7 +2878,7 @@ out:;
       if ((en_ulPhysicsFlags&EPF_ONBLOCK_MASK)==EPF_ONBLOCK_PUSH) {
         penPusher = this;
       }
-      BOOL bMoveSuccessfull = TryToMove(penPusher, TRUE, TRUE);
+      /* BOOL bMoveSuccessfull = */ TryToMove(penPusher, TRUE, TRUE);
 
     // if rotation and translation are asynchronious
     } else {
diff --git a/Sources/Engine/Graphics/DrawPort.cpp b/Sources/Engine/Graphics/DrawPort.cpp
index 0722ce3..ce03348 100755
--- a/Sources/Engine/Graphics/DrawPort.cpp
+++ b/Sources/Engine/Graphics/DrawPort.cpp
@@ -799,7 +799,7 @@ void CDrawPort::Fill( PIX pixI, PIX pixJ, PIX pixWidth, PIX pixHeight,
     // thru OpenGL
     gfxResetArrays();
     GFXVertex   *pvtx = _avtxCommon.Push(4);
-    GFXTexCoord *ptex = _atexCommon.Push(4);
+    /* GFXTexCoord *ptex = */ _atexCommon.Push(4);
     GFXColor    *pcol = _acolCommon.Push(4);
     const GFXColor glcolUL(colUL);  const GFXColor glcolUR(colUR);
     const GFXColor glcolDL(colDL);  const GFXColor glcolDR(colDR);
@@ -1617,7 +1617,7 @@ void CDrawPort::AddTriangle( const FLOAT fI0, const FLOAT fJ0,
   const GFXColor glCol( AdjustColor( col, _slTexHueShift, _slTexSaturation));
   const INDEX iStart = _avtxCommon.Count();
   GFXVertex   *pvtx = _avtxCommon.Push(3);
-  GFXTexCoord *ptex = _atexCommon.Push(3);
+  /* GFXTexCoord *ptex = */ _atexCommon.Push(3);
   GFXColor    *pcol = _acolCommon.Push(3);
   INDEX       *pelm = _aiCommonElements.Push(3);
   pvtx[0].x = fI0;  pvtx[0].y = fJ0;  pvtx[0].z = 0;
@@ -1699,7 +1699,7 @@ void CDrawPort::BlendScreen(void)
   // set arrays
   gfxResetArrays();
   GFXVertex   *pvtx = _avtxCommon.Push(4);
-  GFXTexCoord *ptex = _atexCommon.Push(4);
+  /* GFXTexCoord *ptex = */ _atexCommon.Push(4);
   GFXColor    *pcol = _acolCommon.Push(4);
   const INDEX iW = dp_Width;
   const INDEX iH = dp_Height;
diff --git a/Sources/Engine/Graphics/DrawPort_RenderScene.cpp b/Sources/Engine/Graphics/DrawPort_RenderScene.cpp
index 579c53e..18c0033 100644
--- a/Sources/Engine/Graphics/DrawPort_RenderScene.cpp
+++ b/Sources/Engine/Graphics/DrawPort_RenderScene.cpp
@@ -816,6 +816,7 @@ static void RSSetTextureCoords( ScenePolygon *pspoGroup, INDEX iLayer, INDEX iUn
   // generate tex coord for all scene polygons in list
   const FLOATmatrix3D &mViewer = _ppr->pr_ViewerRotationMatrix;
   const INDEX iMappingOffset = iLayer * sizeof(CMappingVectors);
+  (void)iMappingOffset; // shut up compiler, this is used if inline ASM is used
 
   for( ScenePolygon *pspo=pspoGroup; pspo!=NULL; pspo=pspo->spo_pspoSucc)
   {
@@ -1979,7 +1980,7 @@ void RenderSceneBackground(CDrawPort *pDP, COLOR col)
   // set arrays
   gfxResetArrays();
   GFXVertex   *pvtx = _avtxCommon.Push(4);
-  GFXTexCoord *ptex = _atexCommon.Push(4);
+  /* GFXTexCoord *ptex = */ _atexCommon.Push(4);
   GFXColor    *pcol = _acolCommon.Push(4);
   pvtx[0].x =  0;  pvtx[0].y =  0;  pvtx[0].z = 1;
   pvtx[1].x =  0;  pvtx[1].y = iH;  pvtx[1].z = 1;
diff --git a/Sources/Engine/Graphics/Graphics.cpp b/Sources/Engine/Graphics/Graphics.cpp
index 4f3dc06..440c27f 100644
--- a/Sources/Engine/Graphics/Graphics.cpp
+++ b/Sources/Engine/Graphics/Graphics.cpp
@@ -665,6 +665,7 @@ void DitherBitmap( INDEX iDitherType, ULONG *pulSrc, ULONG *pulDst, PIX pixWidth
   ASSERT( pixCanvasWidth>=pixWidth && pixCanvasHeight>=pixHeight);
   SLONG slModulo      = (pixCanvasWidth-pixWidth) *BYTES_PER_TEXEL;
   SLONG slWidthModulo = pixWidth*BYTES_PER_TEXEL +slModulo;
+  (void)slWidthModulo; // shut up compiler, this is used if inline ASM is used
 
   // if bitmap is smaller than 4x2 pixels
   if( pixWidth<4 || pixHeight<2)
diff --git a/Sources/Engine/Models/Model.cpp b/Sources/Engine/Models/Model.cpp
index 198d809..e3847d2 100644
--- a/Sources/Engine/Models/Model.cpp
+++ b/Sources/Engine/Models/Model.cpp
@@ -1397,9 +1397,11 @@ void CModelData::Read_t( CTStream *pFile) // throw char *
     if( cidVerticesChunk == CChunkID("AV16"))
     {
       CChunkID cidDummy = pFile->GetID_t();
+      (void)cidDummy; // shut up about unused variable, compiler.
       ULONG ulDummy;
       // skip chunk size
       *pFile >> ulDummy;
+      (void)ulDummy; // shut up about unused variable, compiler.
       for( INDEX iVtx=0; iVtx<md_VerticesCt * md_FramesCt; iVtx++)
       {
         (*pFile)>>md_FrameVertices16[iVtx];
@@ -2859,22 +2861,26 @@ void CModelObject::AutoSetTextures(void)
       if( id == CChunkID("WTEX"))
       {
         CChunkID idDummy = strmIni.GetID_t();
+        (void)idDummy; // shut up about unused variable, compiler.
         strmIni >> ctDiffuseTextures;
         strmIni >> fnDiffuse;
       }
       else if( id == CChunkID("FXTR"))
       {
         CChunkID idDummy = strmIni.GetID_t();
+        (void)idDummy; // shut up about unused variable, compiler.
         strmIni >> fnReflection;
       }
       else if( id == CChunkID("FXTS"))
       {
         CChunkID idDummy = strmIni.GetID_t();
+        (void)idDummy; // shut up about unused variable, compiler.
         strmIni >> fnSpecular;
       }
       else if( id == CChunkID("FXTB"))
       {
         CChunkID idDummy = strmIni.GetID_t();
+        (void)idDummy; // shut up about unused variable, compiler.
         strmIni >> fnBump;
       }
       else
@@ -2914,6 +2920,7 @@ void CModelObject::AutoSetAttachments(void)
       if( id == CChunkID("ATTM"))
       {
         CChunkID idDummy = strmIni.GetID_t();
+        (void)idDummy; // shut up about unused variable, compiler.
         // try to load attached models
         INDEX ctAttachedModels;
         strmIni >> ctAttachedModels;
diff --git a/Sources/Engine/Rendering/RendASER.cpp b/Sources/Engine/Rendering/RendASER.cpp
index 5a642cd..67fee4f 100644
--- a/Sources/Engine/Rendering/RendASER.cpp
+++ b/Sources/Engine/Rendering/RendASER.cpp
@@ -763,7 +763,7 @@ CScreenPolygon *CRenderer::ScanOneLine(void)
     }
     // remove all left-over polygons from stack
     do {
-      BOOL bWasTop = RemPolygonFromSurfaceStack(*pspoTop);
+      /* BOOL bWasTop = */ RemPolygonFromSurfaceStack(*pspoTop);
       pspoTop = LIST_HEAD(re_lhSurfaceStack, CScreenPolygon, spo_lnInStack);
     } while (&re_spoFarSentinel != pspoTop);
     // mark start of background span at right border
diff --git a/Sources/Engine/Rendering/RenderBrushes.cpp b/Sources/Engine/Rendering/RenderBrushes.cpp
index d8e8520..e9b45a9 100644
--- a/Sources/Engine/Rendering/RenderBrushes.cpp
+++ b/Sources/Engine/Rendering/RenderBrushes.cpp
@@ -154,7 +154,7 @@ void CRenderer::DrawBrushPolygonVerticesAndEdges(CBrushPolygon &bpo)
  */
 void CRenderer::DrawBrushSectorVerticesAndEdges(CBrushSector &bscSector)
 {
-  CBrushMip *pbm = bscSector.bsc_pbmBrushMip;
+  //CBrushMip *pbm = bscSector.bsc_pbmBrushMip;
   //CBrush3D &br = *pbm->bm_pbrBrush;
 
   // clear all vertex drawn flags
diff --git a/Sources/Engine/Terrain/TerrainArchive.cpp b/Sources/Engine/Terrain/TerrainArchive.cpp
index c0e3fa8..ee0a137 100644
--- a/Sources/Engine/Terrain/TerrainArchive.cpp
+++ b/Sources/Engine/Terrain/TerrainArchive.cpp
@@ -44,7 +44,7 @@ void CTerrainArchive::Read_t( CTStream *istrFile) // throw char *
   // if there are some terrains
   if (ctTerrains!=0) {
     // create that much terrains
-    CTerrain *atrBrushes = ta_atrTerrains.New(ctTerrains);
+    /* CTerrain *atrBrushes = */ ta_atrTerrains.New(ctTerrains);
     // for each of the new terrains
     for (INDEX iTerrain=0; iTerrain<ctTerrains; iTerrain++) {
       // read it from stream
diff --git a/Sources/Engine/World/WorldCSG.cpp b/Sources/Engine/World/WorldCSG.cpp
index f68e55c..d69e846 100644
--- a/Sources/Engine/World/WorldCSG.cpp
+++ b/Sources/Engine/World/WorldCSG.cpp
@@ -1008,12 +1008,14 @@ void CheckOnePolygon(CBrushSector &bsc, CBrushPolygon &bpo)
   //       "try to access stuff and make sure it doesn't segfault", so keep it
   //       like it is even if the compiler complains about unused values?
   CBrushPlane *pbplPlane=bpo.bpo_pbplPlane;
+  (void)pbplPlane; // shut up, compiler - I know this is unused, but I think it's intended like that.
   INDEX ctEdges=bpo.bpo_abpePolygonEdges.Count();
   INDEX ctVertices=bpo.bpo_apbvxTriangleVertices.Count();
   for(INDEX iEdge=0;iEdge<ctEdges;iEdge++)
   {
     CBrushPolygonEdge &edg=bpo.bpo_abpePolygonEdges[iEdge];
     CBrushEdge &be=*edg.bpe_pbedEdge;
+    (void)be; // shut up, compiler
     CBrushVertex *pbvx0, *pbvx1;
     edg.GetVertices(pbvx0, pbvx1);
   }
@@ -1025,11 +1027,13 @@ void CheckOnePolygon(CBrushSector &bsc, CBrushPolygon &bpo)
     DOUBLE3D vdRel=vtx.bvx_vdPreciseRelative;
     DOUBLE3D *pvdPreciseAbsolute=vtx.bvx_pvdPreciseAbsolute;
     CBrushSector &bsc=*vtx.bvx_pbscSector;
+    (void)vAbs; (void)vRel; (void)vdRel; (void)pvdPreciseAbsolute; (void)bsc; // shut up, compiler
   }
   for(INDEX ite=0;ite<bpo.bpo_aiTriangleElements.Count();ite++)
   {
     INDEX iTriangleVtx=bpo.bpo_aiTriangleElements[ite];
     CBrushSector &bsc=*bpo.bpo_pbscSector;
+    (void)iTriangleVtx; (void)bsc; // ...
   }
 }
 
diff --git a/Sources/Engine/World/WorldIO.cpp b/Sources/Engine/World/WorldIO.cpp
index fa6989f..a2c6983 100644
--- a/Sources/Engine/World/WorldIO.cpp
+++ b/Sources/Engine/World/WorldIO.cpp
@@ -384,7 +384,7 @@ void CWorld::ReadState_veryold_t( CTStream *istr) // throw char *
     // read entity class index and entity placement
     (*istr)>>iEntityClass>>plPlacement;
     // create an entity of that class
-    CEntity *penNew = CreateEntity_t(plPlacement, cecClasses[iEntityClass]);
+    /* CEntity *penNew = */ CreateEntity_t(plPlacement, cecClasses[iEntityClass]);
   }}
 
   // for each entity
@@ -498,7 +498,7 @@ void CWorld::ReadState_old_t( CTStream *istr) // throw char *
     // read entity class index and entity placement
     (*istr)>>iEntityClass>>plPlacement;
     // create an entity of that class
-    CEntity *penNew = CreateEntity_t(plPlacement, cecClasses[iEntityClass]);
+    /* CEntity *penNew = */ CreateEntity_t(plPlacement, cecClasses[iEntityClass]);
   }}
 
   // for each entity
diff --git a/Sources/Entities/Common/HUD.cpp b/Sources/Entities/Common/HUD.cpp
index 60598a5..a776e57 100644
--- a/Sources/Entities/Common/HUD.cpp
+++ b/Sources/Entities/Common/HUD.cpp
@@ -234,6 +234,7 @@ static int qsort_CompareDeaths( const void *ppPEN0, const void *ppPEN1) {
   else              return  0;
 }
 
+#if 0 // DG: unused
 static int qsort_CompareLatencies( const void *ppPEN0, const void *ppPEN1) {
   CPlayer &en0 = **(CPlayer**)ppPEN0;
   CPlayer &en1 = **(CPlayer**)ppPEN1;
@@ -243,6 +244,7 @@ static int qsort_CompareLatencies( const void *ppPEN0, const void *ppPEN1) {
   else if( sl0>sl1) return -1;
   else              return  0;
 }
+#endif // 0 (unused)
 
 // prepare color transitions
 static void PrepareColorTransitions( COLOR colFine, COLOR colHigh, COLOR colMedium, COLOR colLow,
@@ -690,7 +692,7 @@ extern void DrawHUD( const CPlayer *penPlayerCurrent, CDrawPort *pdpCurrent, BOO
   _fCustomScaling = ClampDn( _fCustomScaling*0.8f, 0.5f);
   const FLOAT fOneUnitS  = fOneUnit  *0.8f;
   const FLOAT fAdvUnitS  = fAdvUnit  *0.8f;
-  const FLOAT fNextUnitS = fNextUnit *0.8f;
+  //const FLOAT fNextUnitS = fNextUnit *0.8f;
   const FLOAT fHalfUnitS = fHalfUnit *0.8f;
 
   // prepare postition and ammo quantities
@@ -868,7 +870,7 @@ extern void DrawHUD( const CPlayer *penPlayerCurrent, CDrawPort *pdpCurrent, BOO
       if( iHealth>25) colHealth = _colHUD;
       if( iArmor >25) colArmor  = _colHUD;
       // eventually print it out
-      if( hud_iShowPlayers==1 || hud_iShowPlayers==-1 && !bSinglePlay) {
+      if( hud_iShowPlayers==1 || (hud_iShowPlayers==-1 && !bSinglePlay)) {
         // printout location and info aren't the same for deathmatch and coop play
         const FLOAT fCharWidth = (PIX)((_pfdDisplayFont->GetWidth()-2) *fTextScale);
         if( bCooperative) { 
diff --git a/Sources/Entities/Common/Particles.cpp b/Sources/Entities/Common/Particles.cpp
index 204948b..a7a956c 100644
--- a/Sources/Entities/Common/Particles.cpp
+++ b/Sources/Entities/Common/Particles.cpp
@@ -276,7 +276,7 @@ void Particles_RomboidTrail(CEntity *pen)
   for(INDEX iPos = 0; iPos<plp->lp_ctUsed; iPos++)
   {
     FLOAT3D vPos = plp->GetPosition(iPos);
-    FLOAT fRand = rand()/FLOAT(RAND_MAX);
+    //FLOAT fRand = rand()/FLOAT(RAND_MAX);
     FLOAT fAngle = fSeconds*256+iPos*2.0f*PI/ROMBOID_TRAIL_POSITIONS;
     FLOAT fSin = FLOAT(sin(fAngle));
     vPos(2) += fSin*iPos/ROMBOID_TRAIL_POSITIONS;
@@ -437,7 +437,7 @@ void Particles_WhiteLineTrail(CEntity *pen)
     vPos(1) += fSin*iPos*1.0f/WHITE_LINE_TRAIL_POSITIONS;
     vPos(2) += fCos*iPos*1.0f/WHITE_LINE_TRAIL_POSITIONS;
 
-    UBYTE ub = 255-iPos*256/WHITE_LINE_TRAIL_POSITIONS;
+    //UBYTE ub = 255-iPos*256/WHITE_LINE_TRAIL_POSITIONS;
     FLOAT fLerpFactor = FLOAT(iPos)/WHITE_LINE_TRAIL_POSITIONS;
     COLOR colColor = LerpColor( C_YELLOW, C_dRED, fLerpFactor);
     Particle_RenderLine( vPos, vOldPos, 0.05f, colColor);
@@ -533,7 +533,7 @@ void Particles_CannonBall_Prepare(CEntity *pen)
 void Particles_CannonBall(CEntity *pen, FLOAT fSpeedRatio)
 {
   CLastPositions *plp = pen->GetLastPositions(CANNON_TRAIL_POSITIONS);
-  FLOAT fSeconds = _pTimer->GetLerpedCurrentTick();
+ // FLOAT fSeconds = _pTimer->GetLerpedCurrentTick();
   
   Particle_PrepareTexture(&_toCannonBall, PBT_BLEND);
   Particle_SetTexturePart( 512, 512, 0, 0);
@@ -718,9 +718,9 @@ void Particles_BeastProjectileTrail( CEntity *pen, FLOAT fSize, FLOAT fHeight, I
     fT *= 1/BEAST_PROJECTILE_TOTAL_TIME;
     // get fraction part
     fT = fT-int(fT);
-    FLOAT fFade;
-    if (fT>(1.0f-BEAST_PROJECTILE_FADE_OUT)) fFade=(1-fT)*(1/BEAST_PROJECTILE_FADE_OUT);
-    else fFade=1.0f;
+    //FLOAT fFade;
+    //if (fT>(1.0f-BEAST_PROJECTILE_FADE_OUT)) fFade=(1-fT)*(1/BEAST_PROJECTILE_FADE_OUT);
+    //else fFade=1.0f;
 
 #define GET_POS( time) vCenter + \
       vX*(afStarsPositions[iStar][0]*time*fSize*1.5) +\
@@ -816,7 +816,7 @@ void Particles_RocketTrail_Prepare(CEntity *pen)
 void Particles_RocketTrail(CEntity *pen, FLOAT fStretch)
 {
   CLastPositions *plp = pen->GetLastPositions(ROCKET_TRAIL_POSITIONS);
-  FLOAT fSeconds = _pTimer->GetLerpedCurrentTick();
+  //FLOAT fSeconds = _pTimer->GetLerpedCurrentTick();
   
   Particle_PrepareTexture(&_toRocketTrail, PBT_ADD);
   Particle_SetTexturePart( 512, 512, 0, 0);
@@ -835,7 +835,7 @@ void Particles_RocketTrail(CEntity *pen, FLOAT fStretch)
     }
     for (INDEX iInter=0; iInter<ROCKET_TRAIL_INTERPOSITIONS; iInter++)
     {
-      FLOAT fRand = rand()/FLOAT(RAND_MAX);
+      //FLOAT fRand = rand()/FLOAT(RAND_MAX);
       FLOAT fAngle = 0.0f;
       FLOAT3D vPos = Lerp(*pvPos1, *pvPos2, iInter*1.0f/ROCKET_TRAIL_INTERPOSITIONS);
       FLOAT fSize = iParticle*0.5f/iParticlesLiving*fStretch+0.25f;
@@ -888,9 +888,9 @@ void Particles_BloodTrail(CEntity *pen)
   {
     Particle_SetTexturePart( 256, 256, iPos%8, 0);
     FLOAT3D vPos = plp->GetPosition(iPos);
-    FLOAT fRand  = rand()/FLOAT(RAND_MAX);
+    //FLOAT fRand  = rand()/FLOAT(RAND_MAX);
     FLOAT fAngle = iPos*2.0f*PI/BLOOD01_TRAIL_POSITIONS;
-    FLOAT fSin = FLOAT(sin(fAngle));
+    //FLOAT fSin = FLOAT(sin(fAngle));
     FLOAT fT = iPos*_pTimer->TickQuantum;
     vPos += vGDir*fGA*fT*fT/8.0f;
     FLOAT fSize = 0.2f-iPos*0.15f/BLOOD01_TRAIL_POSITIONS;
@@ -1709,7 +1709,7 @@ void Particles_Rain(CEntity *pen, FLOAT fGridSize, INDEX ctGrids, FLOAT fFactor,
     pixRainMapH = ptdRainMap->GetPixHeight();
   }
 
-  INDEX ctDiscarded=0;
+  //INDEX ctDiscarded=0;
   for( INDEX iZ=0; iZ<ctGrids; iZ++)
   {
     INDEX iRndZ = (ULONG(vPos(3)+iZ)) % CT_MAX_PARTICLES_TABLE;
@@ -1803,7 +1803,7 @@ void Particles_Snow( CEntity *pen, FLOAT fGridSize, INDEX ctGrids)
       UBYTE ubR = 128+afStarsPositions[(INDEX)fT0*CT_MAX_PARTICLES_TABLE][2]*64;
       COLOR colDrop = RGBToColor(ubR, ubR, ubR)|CT_OPAQUE;
       FLOAT3D vRender = FLOAT3D( fX, fY, fZ);
-      FLOAT fSize = 1.75f+afStarsPositions[(INDEX)fT0*CT_MAX_PARTICLES_TABLE][1];
+      //FLOAT fSize = 1.75f+afStarsPositions[(INDEX)fT0*CT_MAX_PARTICLES_TABLE][1];
       Particle_RenderSquare( vRender, 0.1f, 0, colDrop);
     }
   }
@@ -2113,9 +2113,9 @@ void Particles_BulletSpray(CEntity *pen, FLOAT3D vGDir, enum EffectParticlesType
       fSpeedStart = 1.75f;
       fConeMultiplier = 0.125f;
 
-      FLOAT fFadeStart = BULLET_SPRAY_WATER_FADEOUT_START;
-      FLOAT fLifeTotal = BULLET_SPRAY_WATER_TOTAL_TIME;
-      FLOAT fFadeLen   = fLifeTotal-fFadeStart;
+      //FLOAT fFadeStart = BULLET_SPRAY_WATER_FADEOUT_START;
+      //FLOAT fLifeTotal = BULLET_SPRAY_WATER_TOTAL_TIME;
+      //FLOAT fFadeLen   = fLifeTotal-fFadeStart;
 
       break;
     }
@@ -2321,7 +2321,7 @@ void Particles_EmptyShells( CEntity *pen, ShellLaunchData *asldData)
         {
           // render smoke
           INDEX iRnd = (INDEX(tmLaunch*1234))%CT_MAX_PARTICLES_TABLE;
-          FLOAT fTRatio = fT/fLife;
+          //FLOAT fTRatio = fT/fLife;
           INDEX iColumn = 4+INDEX( iShell)%4;
           Particle_SetTexturePart( 256, 256, iColumn, 2);
 
@@ -2342,7 +2342,7 @@ void Particles_EmptyShells( CEntity *pen, ShellLaunchData *asldData)
         {
           // render smoke
           INDEX iRnd = (INDEX(tmLaunch*1234))%CT_MAX_PARTICLES_TABLE;
-          FLOAT fTRatio = fT/fLife;
+          //FLOAT fTRatio = fT/fLife;
           INDEX iColumn = 4+INDEX( iShell)%4;
           Particle_SetTexturePart( 256, 256, iColumn, 2);
 
@@ -2369,7 +2369,7 @@ void Particles_EmptyShells( CEntity *pen, ShellLaunchData *asldData)
           FLOAT3D vUp( m(1,2), m(2,2), m(3,2));
 
           INDEX iRnd = (INDEX(tmLaunch*1234))%CT_MAX_PARTICLES_TABLE;
-          FLOAT fTRatio = fT/fLife;
+          //FLOAT fTRatio = fT/fLife;
           INDEX iColumn = 4+INDEX( iShell)%4;
           Particle_SetTexturePart( 256, 256, iColumn, 2);
 
@@ -2495,7 +2495,7 @@ void Particles_Appearing(CEntity *pen, TIME tmStart)
   if( (fTime<APPEAR_IN_START) || (fTime>APPEAR_OUT_END)) {
     return;
   }
-  FLOAT fPowerTime = pow(fTime-SPIRIT_SPIRAL_START, 2.5f);
+  //FLOAT fPowerTime = pow(fTime-SPIRIT_SPIRAL_START, 2.5f);
 
   // fill array with absolute vertices of entity's model and its attached models
   pen->GetModelVerticesAbsolute(avVertices, 0.05f, fMipFactor); 
@@ -2505,7 +2505,7 @@ void Particles_Appearing(CEntity *pen, TIME tmStart)
   FLOAT3D vX( m(1,1), m(2,1), m(3,1));
   FLOAT3D vY( m(1,2), m(2,2), m(3,2));
   FLOAT3D vZ( m(1,3), m(2,3), m(3,3));
-  FLOAT3D vCenter = pen->GetLerpedPlacement().pl_PositionVector;
+  //FLOAT3D vCenter = pen->GetLerpedPlacement().pl_PositionVector;
   
   SetupParticleTexture( PT_STAR07);
 
@@ -2524,12 +2524,12 @@ void Particles_Appearing(CEntity *pen, TIME tmStart)
   COLOR col = RGBToColor(ubColor,ubColor,ubColor)|CT_OPAQUE;
 
   INDEX ctVtx = avVertices.Count();
-  FLOAT fSpeedFactor = 1.0f/ctVtx;
+  //FLOAT fSpeedFactor = 1.0f/ctVtx;
 
   // get corp size
   FLOATaabbox3D box;
   pen->en_pmoModelObject->GetCurrentFrameBBox(box);
-  FLOAT fHeightStretch = box.Size()(2);
+  //FLOAT fHeightStretch = box.Size()(2);
 
   FLOAT fStep = ClampDn( fMipFactor, 1.0f);
   for( FLOAT fVtx=0.0f; fVtx<ctVtx; fVtx+=fStep)
@@ -2733,7 +2733,7 @@ void Particles_BloodSpray(enum SprayParticlesType sptType, CEntity *penSpray, FL
       else
       {
         UBYTE ubRndH = UBYTE( 32+afStarsPositions[ int(iSpray+tmStarted*10)%CT_MAX_PARTICLES_TABLE][0]*16);
-        UBYTE ubRndS = UBYTE( 127+(afStarsPositions[ int(iSpray+tmStarted*10)%CT_MAX_PARTICLES_TABLE][1]+0.5)*128);
+        //UBYTE ubRndS = UBYTE( 127+(afStarsPositions[ int(iSpray+tmStarted*10)%CT_MAX_PARTICLES_TABLE][1]+0.5)*128);
         UBYTE ubRndV = UBYTE( 159+(afStarsPositions[ int(iSpray+tmStarted*10)%CT_MAX_PARTICLES_TABLE][2])*192);
         col = HSVToColor(ubRndH, 0, ubRndV)|ubAlpha;
         fSize/=2.0f;
diff --git a/Sources/Entities/Debris.es b/Sources/Entities/Debris.es
index 0cf8055..03be50e 100644
--- a/Sources/Entities/Debris.es
+++ b/Sources/Entities/Debris.es
@@ -66,7 +66,7 @@ functions:
   {
     // cannot be damaged immediately after spawning
     if ((_pTimer->CurrentTick()-m_tmStarted<1.0f)
-      ||(dmtType==DMT_CANNONBALL_EXPLOSION) && (_pTimer->CurrentTick()-m_tmStarted<5.0f)) {
+      ||((dmtType==DMT_CANNONBALL_EXPLOSION) && (_pTimer->CurrentTick()-m_tmStarted<5.0f))) {
       return;
     }
     CMovableModelEntity::ReceiveDamage(penInflictor, dmtType, fDamageAmmount, vHitPoint, vDirection);
diff --git a/Sources/Entities/Dragonman.es b/Sources/Entities/Dragonman.es
index 59d2301..a20680b 100644
--- a/Sources/Entities/Dragonman.es
+++ b/Sources/Entities/Dragonman.es
@@ -444,8 +444,8 @@ procedures:
 
   Hit(EVoid) : CEnemyBase::Hit {
     // burn enemy
-    if (m_EdtType == DT_SERGEANT && CalcDist(m_penEnemy) <= 6.0f  ||
-        m_EdtType == DT_MONSTER  && CalcDist(m_penEnemy) <= 20.0f) {
+    if ((m_EdtType == DT_SERGEANT && CalcDist(m_penEnemy) <= 6.0f)  ||
+        (m_EdtType == DT_MONSTER  && CalcDist(m_penEnemy) <= 20.0f)) {
       jump BurnEnemy();
     }
 
diff --git a/Sources/Entities/Effector.es b/Sources/Entities/Effector.es
index 09bcd59..027d1d3 100644
--- a/Sources/Entities/Effector.es
+++ b/Sources/Entities/Effector.es
@@ -110,7 +110,7 @@ functions:
 
   void AdjustMipFactor(FLOAT &fMipFactor)
   {
-    if (m_eetType==ET_DISAPPEAR_MODEL || m_eetType==ET_DISAPPEAR_MODEL_NOW && m_penModel!=NULL)
+    if (m_eetType==ET_DISAPPEAR_MODEL || (m_eetType==ET_DISAPPEAR_MODEL_NOW && m_penModel!=NULL))
     {
       CModelObject *pmo = m_penModel->GetModelObject();
       TIME tmDelta = _pTimer->GetLerpedCurrentTick()-m_tmStarted;
@@ -131,7 +131,7 @@ functions:
       COLOR col = C_WHITE|ubAlpha;
       pmo->mo_colBlendColor = col;
     }
-    if (m_eetType==ET_APPEAR_MODEL || m_eetType==ET_APPEAR_MODEL_NOW && m_penModel!=NULL)
+    if (m_eetType==ET_APPEAR_MODEL || (m_eetType==ET_APPEAR_MODEL_NOW && m_penModel!=NULL))
     {
       CModelObject *pmo = m_penModel->GetModelObject();
       TIME tmDelta = _pTimer->GetLerpedCurrentTick()-m_tmStarted;
@@ -434,7 +434,7 @@ procedures:
     // setup light source
     if (m_bLightSource) { SetupLightSource(); }
 
-    while(_pTimer->CurrentTick()<m_tmStarted+m_tmLifeTime && m_bAlive || m_bWaitTrigger)
+    while((_pTimer->CurrentTick()<m_tmStarted+m_tmLifeTime && m_bAlive) || m_bWaitTrigger)
     {
       wait( 0.25f)
       {
diff --git a/Sources/Entities/Elemental.es b/Sources/Entities/Elemental.es
index 5e6d8a2..c5b4194 100644
--- a/Sources/Entities/Elemental.es
+++ b/Sources/Entities/Elemental.es
@@ -425,6 +425,7 @@ functions:
         default: iAnim = ELEMENTALLAVA_ANIM_WOUND03; break;
       }
     } else {
+        iAnim = 0; // DG: should at least have deterministic value
 /*      switch (IRnd()%3) {
         case 0: iAnim = STONEMAN_ANIM_WOUND01; break;
         case 1: iAnim = STONEMAN_ANIM_WOUND02; break;
@@ -494,6 +495,7 @@ functions:
     if (m_EetType == ELT_LAVA) {
       iAnim = ELEMENTALLAVA_ANIM_DEATH03;
     } else {
+      iAnim = 0; // DG: should at least have deterministic value
 //      iAnim = STONEMAN_ANIM_DEATH03;
     }
     StartModelAnim(iAnim, 0);
@@ -821,20 +823,23 @@ functions:
     GetBoundingBox(box);
     FLOAT fEntitySize = box.Size().MaxNorm()/2;
 
+/*
     INDEX iCount = 1;
     switch (m_EecChar) {
       case ELC_SMALL: iCount = 3; break;
       case ELC_BIG: iCount = 5; break;
       case ELC_LARGE: iCount = 7; break;
     }
+*/
 
     FLOAT3D vNormalizedDamage = m_vDamage-m_vDamage*(m_fBlowUpAmount/m_vDamage.Length());
     vNormalizedDamage /= Sqrt(vNormalizedDamage.Length());
     vNormalizedDamage *= 1.75f;
+
+/*
     FLOAT3D vBodySpeed = en_vCurrentTranslationAbsolute-en_vGravityDir*(en_vGravityDir%en_vCurrentTranslationAbsolute);
 
     // spawn debris
-/*
     switch (m_EetType) {
       case ELT_ICE: {
         Debris_Begin(EIBT_ICE, DPT_NONE, BET_NONE, fEntitySize, vNormalizedDamage, vBodySpeed, 1.0f, 0.0f);
@@ -1213,6 +1218,7 @@ procedures:
     if (m_EetType == ELT_LAVA) {
       iAnim = ELEMENTALLAVA_ANIM_MELTUP;
     } else {
+      iAnim = 0; // DG: should at least have deterministic value
 //      iAnim = STONEMAN_ANIM_MORPHPLANEUP;
     }
     StartModelAnim(iAnim, 0);
@@ -1318,7 +1324,7 @@ procedures:
       autocall FallOnFloor() EReturn;
     }
 
-    if (m_EecChar==ELC_LARGE || m_EecChar==ELC_BIG && m_EetType==ELT_LAVA)
+    if (m_EecChar==ELC_LARGE || (m_EecChar==ELC_BIG && m_EetType==ELT_LAVA))
     {
       PlaySound(m_soBackground, SOUND_LAVA_LAVABURN, SOF_3D|SOF_LOOP);
     }
diff --git a/Sources/Entities/Fish.es b/Sources/Entities/Fish.es
index 4a969a5..67ca3b1 100644
--- a/Sources/Entities/Fish.es
+++ b/Sources/Entities/Fish.es
@@ -125,7 +125,7 @@ functions:
       // render one lightning toward enemy
       FLOAT3D vSource = GetPlacement().pl_PositionVector;
       FLOAT3D vTarget = m_penEnemy->GetPlacement().pl_PositionVector;
-      FLOAT3D vDirection = (vTarget-vSource).Normalize();
+      //FLOAT3D vDirection = (vTarget-vSource).Normalize();
       Particles_Ghostbuster(vSource, vTarget, 32, 1.0f);
 
       // random lightnings arround
diff --git a/Sources/Entities/Item.es b/Sources/Entities/Item.es
index fe88424..f0bc149 100644
--- a/Sources/Entities/Item.es
+++ b/Sources/Entities/Item.es
@@ -56,7 +56,7 @@ functions:
       return;
     }
 
-    BOOL bFlare = TRUE;
+    //BOOL bFlare = TRUE;
     // if current player has already picked this item
     if (_ulPlayerRenderingMask&m_ulPickedMask) {
       // if picked items are not rendered
@@ -67,10 +67,10 @@ functions:
       }
       // if picked item particles are not rendered
       extern INDEX plr_bRenderPickedParticles;
-      if (!plr_bRenderPickedParticles) {
+      /*if (!plr_bRenderPickedParticles) {
         // kill flare 
-        bFlare = FALSE;
-      }
+        bFlare = FALSE; // DG: bFlare is not otherwise used!
+      }*/
     }
 
     // implement flare on/off ?
diff --git a/Sources/Entities/ModelHolder2.es b/Sources/Entities/ModelHolder2.es
index f07188a..f54bdfe 100644
--- a/Sources/Entities/ModelHolder2.es
+++ b/Sources/Entities/ModelHolder2.es
@@ -173,7 +173,7 @@ functions:
     } else {
       vDirectionFixed = FLOAT3D(0,1,0);
     }
-    FLOAT3D vDamageOld = m_vDamage;
+    //FLOAT3D vDamageOld = m_vDamage;
     m_vDamage += vDirectionFixed*fKickDamage;
 
     // NOTE: we don't receive damage here, but handle death differently
diff --git a/Sources/Entities/Player.es b/Sources/Entities/Player.es
index d02be99..b1f58ac 100644
--- a/Sources/Entities/Player.es
+++ b/Sources/Entities/Player.es
@@ -462,10 +462,10 @@ DECL_DLL void ctl_ComposeActionPacket(const CPlayerCharacter &pc, CPlayerAction
   }
 
   // add button movement/rotation/look actions to the axis actions
-  if(pctlCurrent.bMoveForward  || pctlCurrent.bStrafeFB&&pctlCurrent.bTurnUp  ) paAction.pa_vTranslation(3) -= plr_fSpeedForward;
-  if(pctlCurrent.bMoveBackward || pctlCurrent.bStrafeFB&&pctlCurrent.bTurnDown) paAction.pa_vTranslation(3) += plr_fSpeedBackward;
-  if(pctlCurrent.bMoveLeft  || pctlCurrent.bStrafe&&pctlCurrent.bTurnLeft) paAction.pa_vTranslation(1) -= plr_fSpeedSide;
-  if(pctlCurrent.bMoveRight || pctlCurrent.bStrafe&&pctlCurrent.bTurnRight) paAction.pa_vTranslation(1) += plr_fSpeedSide;
+  if(pctlCurrent.bMoveForward  || (pctlCurrent.bStrafeFB&&pctlCurrent.bTurnUp)  ) paAction.pa_vTranslation(3) -= plr_fSpeedForward;
+  if(pctlCurrent.bMoveBackward || (pctlCurrent.bStrafeFB&&pctlCurrent.bTurnDown)) paAction.pa_vTranslation(3) += plr_fSpeedBackward;
+  if(pctlCurrent.bMoveLeft  || (pctlCurrent.bStrafe&&pctlCurrent.bTurnLeft) ) paAction.pa_vTranslation(1) -= plr_fSpeedSide;
+  if(pctlCurrent.bMoveRight || (pctlCurrent.bStrafe&&pctlCurrent.bTurnRight)) paAction.pa_vTranslation(1) += plr_fSpeedSide;
   if(pctlCurrent.bMoveUp       ) paAction.pa_vTranslation(2) += plr_fSpeedUp;
   if(pctlCurrent.bMoveDown     ) paAction.pa_vTranslation(2) -= plr_fSpeedUp;
 
@@ -3702,7 +3702,7 @@ functions:
       }
 
       // if just started swimming
-      if (m_pstState == PST_SWIM && _pTimer->CurrentTick()<m_fSwimTime+0.5f
+      if ((m_pstState == PST_SWIM && _pTimer->CurrentTick()<m_fSwimTime+0.5f)
         ||_pTimer->CurrentTick()<m_tmOutOfWater+0.5f) {
         // no up/down change
         vTranslation(2)=0;
@@ -3852,7 +3852,8 @@ functions:
   void DeathActions(const CPlayerAction &paAction) {
     // set heading, pitch and banking from the normal rotation into the camera view rotation
     if (m_penView!=NULL) {
-      ASSERT(IsPredicted()&&m_penView->IsPredicted()||IsPredictor()&&m_penView->IsPredictor()||!IsPredicted()&&!m_penView->IsPredicted()&&!IsPredictor()&&!m_penView->IsPredictor());
+      ASSERT((IsPredicted()&&m_penView->IsPredicted()) || (IsPredictor()&&m_penView->IsPredictor())
+            || (!IsPredicted()&&!m_penView->IsPredicted()&&!IsPredictor()&&!m_penView->IsPredictor()));
       en_plViewpoint.pl_PositionVector = FLOAT3D(0, 1, 0);
       en_plViewpoint.pl_OrientationAngle += (ANGLE3D(
         (ANGLE)((FLOAT)paAction.pa_aRotation(1)*_pTimer->TickQuantum),
diff --git a/Sources/Entities/PlayerAnimator.es b/Sources/Entities/PlayerAnimator.es
index 1ec5529..919dfd0 100644
--- a/Sources/Entities/PlayerAnimator.es
+++ b/Sources/Entities/PlayerAnimator.es
@@ -981,7 +981,7 @@ functions:
     FLOAT3D vDesiredTranslation = pl.en_vDesiredTranslationRelative;
     FLOAT3D vCurrentTranslation = pl.en_vCurrentTranslationAbsolute * !pl.en_mRotation;
     ANGLE3D aDesiredRotation = pl.en_aDesiredRotationRelative;
-    ANGLE3D aCurrentRotation = pl.en_aCurrentRotationAbsolute;
+    //ANGLE3D aCurrentRotation = pl.en_aCurrentRotationAbsolute;
 
     // if player is moving
     if (vDesiredTranslation.ManhattanNorm()>0.01f
diff --git a/Sources/Entities/PlayerWeapons.es b/Sources/Entities/PlayerWeapons.es
index debfb7f..92266b9 100644
--- a/Sources/Entities/PlayerWeapons.es
+++ b/Sources/Entities/PlayerWeapons.es
@@ -908,7 +908,7 @@ functions:
       }
     }
     // apply cannon draw
-    else if( (m_iCurrentWeapon == WEAPON_IRONCANNON) /*||
+    else if( m_iCurrentWeapon == WEAPON_IRONCANNON /*||
              (m_iCurrentWeapon == WEAPON_NUKECANNON) */)
     {
       FLOAT fLerpedMovement = Lerp(m_fWeaponDrawPowerOld, m_fWeaponDrawPower, _pTimer->GetLerpFactor());
@@ -3385,7 +3385,7 @@ procedures:
       GetAnimator()->FireAnimation(BODY_ANIM_SHOTGUN_FIRESHORT, AOF_LOOPING);
     } else if (m_iCurrentWeapon==WEAPON_TOMMYGUN) {
       autocall TommyGunStart() EEnd;
-    } else if ((m_iCurrentWeapon==WEAPON_IRONCANNON) /*|| (m_iCurrentWeapon==WEAPON_NUKECANNON)*/) {
+    } else if (m_iCurrentWeapon==WEAPON_IRONCANNON /*|| (m_iCurrentWeapon==WEAPON_NUKECANNON)*/) {
       jump CannonFireStart();
     }
 
diff --git a/Sources/Entities/Projectile.es b/Sources/Entities/Projectile.es
index 84de6f9..6ae1582 100644
--- a/Sources/Entities/Projectile.es
+++ b/Sources/Entities/Projectile.es
@@ -2281,7 +2281,7 @@ procedures:
         ANGLE aHeading = GetRotationSpeed( aWantedHeading, m_aRotateSpeed, fWaitFrequency);
 
         // factor used to decrease speed of projectiles oriented opposite of its target
-        FLOAT fSpeedDecreasingFactor = ((180-abs(aWantedHeading))/180.0f);
+        FLOAT fSpeedDecreasingFactor = ((180-fabsf(aWantedHeading))/180.0f);
         // factor used to increase speed when far away from target
         FLOAT fSpeedIncreasingFactor = (vDesiredPosition-GetPlacement().pl_PositionVector).Length()/100;
         fSpeedIncreasingFactor = ClampDn(fSpeedIncreasingFactor, 1.0f);
@@ -2302,7 +2302,7 @@ procedures:
         FLOAT fRNDPitch = (FRnd()-0.5f)*90*fDistanceFactor;
 
         // if we are looking near direction of target
-        if( abs( aWantedHeading) < 30.0f)
+        if( fabsf( aWantedHeading) < 30.0f)
         {
           // calculate pitch speed
           ANGLE aWantedPitch = GetRelativePitch( vDesiredDirection);
diff --git a/Sources/Entities/PyramidSpaceShip.es b/Sources/Entities/PyramidSpaceShip.es
index 2573221..702b322 100644
--- a/Sources/Entities/PyramidSpaceShip.es
+++ b/Sources/Entities/PyramidSpaceShip.es
@@ -461,7 +461,7 @@ functions:
   void SpawnBeamMachineMainFlare(void)
   {
     // spawn main flare
-    CPlacement3D plSpaceShip = GetPlacement();
+    //CPlacement3D plSpaceShip = GetPlacement();
     CPlacement3D plFlare = CPlacement3D( FLOAT3D(0, BM_MASTER_Y+BM_FLARE_DY, 0), ANGLE3D(0,0,0));
     plFlare.RelativeToAbsolute(GetPlacement());
     CEntity *penFlare = CreateEntity( plFlare, CLASS_EFFECTOR);