diff --git a/source/blood/src/actor.cpp b/source/blood/src/actor.cpp
index f71f763ae..54b718caa 100644
--- a/source/blood/src/actor.cpp
+++ b/source/blood/src/actor.cpp
@@ -5637,7 +5637,6 @@ void actProcessSprites(void)
                             if ((hit&0xc000) != 0xc000 && (nObject < 0 || nObject >= 4096))
                                 break;
                             dassert(nObject >= 0 && nObject < kMaxSprites);
-                            int UNUSED(nOwner) = actSpriteOwnerToSpriteId(pSprite);
                             actExplodeSprite(pSprite);
                             break;
                         }
diff --git a/source/blood/src/ai.cpp b/source/blood/src/ai.cpp
index 34f6c419d..e47611954 100644
--- a/source/blood/src/ai.cpp
+++ b/source/blood/src/ai.cpp
@@ -137,7 +137,6 @@ bool CanMove(spritetype *pSprite, int a2, int nAngle, int nRange)
     if (!FindSector(x, y, z, &nSector))
         return false;
     int floorZ = getflorzofslope(nSector, x, y);
-    int UNUSED(ceilZ) = getceilzofslope(nSector, x, y);
     int nXSector = sector[nSector].extra;
     char Underwater = 0; char Water = 0; char Depth = 0; char Crusher = 0;
     XSECTOR* pXSector = NULL;
@@ -239,7 +238,6 @@ void aiChooseDirection(spritetype *pSprite, XSPRITE *pXSprite, int a3)
     int dx = xvel[nSprite];
     int dy = yvel[nSprite];
     int t1 = dmulscale30(dx, nCos, dy, nSin);
-    int UNUSED(t2) = dmulscale30(dx, nSin, -dy, nCos);
     int vsi = ((t1*15)>>12) / 2;
     int v8 = 341;
     if (vc < 0)
@@ -1431,7 +1429,6 @@ void sub_5F15C(spritetype *pSprite, XSPRITE *pXSprite)
                     DUDEINFO *pDudeInfo = getDudeInfo(pSprite2->type);
                     if (nDist > pDudeInfo->seeDist && nDist > pDudeInfo->hearDist)
                         continue;
-                    int UNUSED(nAngle) = getangle(dx,dy);
                     aiSetTarget(pXSprite, pSprite2->index);
                     aiActivateDude(pSprite, pXSprite);
                     return;
diff --git a/source/blood/src/aibat.cpp b/source/blood/src/aibat.cpp
index 972075cfb..3e2cd87c7 100644
--- a/source/blood/src/aibat.cpp
+++ b/source/blood/src/aibat.cpp
@@ -340,7 +340,6 @@ static void MoveForward(spritetype *pSprite, XSPRITE *pXSprite)
         pSprite->ang = (pSprite->ang+256)&2047;
     int dx = pXSprite->targetX-pSprite->x;
     int dy = pXSprite->targetY-pSprite->y;
-    int UNUSED(nAngle) = getangle(dx, dy);
     int nDist = approxDist(dx, dy);
     if ((unsigned int)Random(64) < 32 && nDist <= 0x200)
         return;
@@ -374,7 +373,6 @@ static void MoveSwoop(spritetype *pSprite, XSPRITE *pXSprite)
     }
     int dx = pXSprite->targetX-pSprite->x;
     int dy = pXSprite->targetY-pSprite->y;
-    int UNUSED(nAngle) = getangle(dx, dy);
     int nDist = approxDist(dx, dy);
     if (Chance(0x600) && nDist <= 0x200)
         return;
@@ -406,7 +404,6 @@ static void MoveFly(spritetype *pSprite, XSPRITE *pXSprite)
     }
     int dx = pXSprite->targetX-pSprite->x;
     int dy = pXSprite->targetY-pSprite->y;
-    int UNUSED(nAngle) = getangle(dx, dy);
     int nDist = approxDist(dx, dy);
     if (Chance(0x4000) && nDist <= 0x200)
         return;
diff --git a/source/blood/src/aibeast.cpp b/source/blood/src/aibeast.cpp
index 3384cb9b8..fa03a4a6e 100644
--- a/source/blood/src/aibeast.cpp
+++ b/source/blood/src/aibeast.cpp
@@ -440,7 +440,6 @@ static void thinkSwimChase(spritetype *pSprite, XSPRITE *pXSprite)
             if (nDist < pDudeInfo->seeDist && klabs(nDeltaAngle) <= pDudeInfo->periphery)
             {
                 aiSetTarget(pXSprite, pXSprite->target);
-                int UNUSED(floorZ) = getflorzofslope(pSprite->sectnum, pSprite->x, pSprite->y);
                 if (nDist < 0x400 && klabs(nDeltaAngle) < 85)
                     aiNewState(pSprite, pXSprite, &beastSwimSlash);
                 else
@@ -470,7 +469,6 @@ static void MoveForward(spritetype *pSprite, XSPRITE *pXSprite)
         return;
     int dx = pXSprite->targetX-pSprite->x;
     int dy = pXSprite->targetY-pSprite->y;
-    int UNUSED(nAngle) = getangle(dx, dy);
     int nDist = approxDist(dx, dy);
     if (nDist <= 0x400 && Random(64) < 32)
         return;
@@ -493,7 +491,6 @@ static void sub_628A0(spritetype *pSprite, XSPRITE *pXSprite)
         pSprite->ang = (pSprite->ang+256)&2047;
     int dx = pXSprite->targetX-pSprite->x;
     int dy = pXSprite->targetY-pSprite->y;
-    int UNUSED(nAngle) = getangle(dx, dy);
     int nDist = approxDist(dx, dy);
     if (Random(64) < 32 && nDist <= 0x400)
         return;
@@ -531,7 +528,6 @@ static void sub_62AE0(spritetype *pSprite, XSPRITE *pXSprite)
     int dx = pXSprite->targetX-pSprite->x;
     int dy = pXSprite->targetY-pSprite->y;
     int dz = z2 - z;
-    int UNUSED(nAngle) = getangle(dx, dy);
     int nDist = approxDist(dx, dy);
     if (Chance(0x600) && nDist <= 0x400)
         return;
@@ -567,7 +563,6 @@ static void sub_62D7C(spritetype *pSprite, XSPRITE *pXSprite)
     int dx = pXSprite->targetX-pSprite->x;
     int dy = pXSprite->targetY-pSprite->y;
     int dz = (z2 - z)<<3;
-    int UNUSED(nAngle) = getangle(dx, dy);
     int nDist = approxDist(dx, dy);
     if (Chance(0x4000) && nDist <= 0x400)
         return;
diff --git a/source/blood/src/aiboneel.cpp b/source/blood/src/aiboneel.cpp
index 4e98853f4..74c6c609a 100644
--- a/source/blood/src/aiboneel.cpp
+++ b/source/blood/src/aiboneel.cpp
@@ -351,7 +351,6 @@ static void MoveForward(spritetype *pSprite, XSPRITE *pXSprite)
         pSprite->ang = (pSprite->ang+256)&2047;
     int dx = pXSprite->targetX-pSprite->x;
     int dy = pXSprite->targetY-pSprite->y;
-    int UNUSED(nAngle) = getangle(dx, dy);
     int nDist = approxDist(dx, dy);
     if (nDist <= 0x399)
         return;
@@ -382,7 +381,6 @@ static void MoveSwoop(spritetype *pSprite, XSPRITE *pXSprite)
         return;
     int dx = pXSprite->targetX-pSprite->x;
     int dy = pXSprite->targetY-pSprite->y;
-    int UNUSED(nAngle) = getangle(dx, dy);
     int nDist = approxDist(dx, dy);
     if (Chance(0x8000) && nDist <= 0x399)
         return;
@@ -411,7 +409,6 @@ static void MoveAscend(spritetype *pSprite, XSPRITE *pXSprite)
         return;
     int dx = pXSprite->targetX-pSprite->x;
     int dy = pXSprite->targetY-pSprite->y;
-    int UNUSED(nAngle) = getangle(dx, dy);
     int nDist = approxDist(dx, dy);
     if (Chance(0x4000) && nDist <= 0x399)
         return;
diff --git a/source/blood/src/aicaleb.cpp b/source/blood/src/aicaleb.cpp
index 27bc9391f..015c97e69 100644
--- a/source/blood/src/aicaleb.cpp
+++ b/source/blood/src/aicaleb.cpp
@@ -307,7 +307,6 @@ static void thinkSwimChase(spritetype *pSprite, XSPRITE *pXSprite)
             if (nDist < pDudeInfo->seeDist && klabs(nDeltaAngle) <= pDudeInfo->periphery)
             {
                 aiSetTarget(pXSprite, pXSprite->target);
-                int UNUSED(floorZ) = getflorzofslope(pSprite->sectnum, pSprite->x, pSprite->y);
                 if (nDist < 0x400 && klabs(nDeltaAngle) < 85)
                     aiNewState(pSprite, pXSprite, &tinycalebSwimAttack);
                 else
@@ -335,7 +334,6 @@ static void sub_65D04(spritetype *pSprite, XSPRITE *pXSprite)
         pSprite->ang = (pSprite->ang+256)&2047;
     int dx = pXSprite->targetX-pSprite->x;
     int dy = pXSprite->targetY-pSprite->y;
-    int UNUSED(nAngle) = getangle(dx, dy);
     int nDist = approxDist(dx, dy);
     if (Random(64) < 32 && nDist <= 0x400)
         return;
@@ -373,7 +371,6 @@ static void sub_65F44(spritetype *pSprite, XSPRITE *pXSprite)
     int dx = pXSprite->targetX-pSprite->x;
     int dy = pXSprite->targetY-pSprite->y;
     int dz = z2 - z;
-    int UNUSED(nAngle) = getangle(dx, dy);
     int nDist = approxDist(dx, dy);
     if (Chance(0x600) && nDist <= 0x400)
         return;
@@ -409,7 +406,6 @@ static void sub_661E0(spritetype *pSprite, XSPRITE *pXSprite)
     int dx = pXSprite->targetX-pSprite->x;
     int dy = pXSprite->targetY-pSprite->y;
     int dz = (z2 - z)<<3;
-    int UNUSED(nAngle) = getangle(dx, dy);
     int nDist = approxDist(dx, dy);
     if (Chance(0x4000) && nDist <= 0x400)
         return;
diff --git a/source/blood/src/aigarg.cpp b/source/blood/src/aigarg.cpp
index 95d0c6284..46820c7a2 100644
--- a/source/blood/src/aigarg.cpp
+++ b/source/blood/src/aigarg.cpp
@@ -138,8 +138,6 @@ static void BlastSSeqCallback(int, int nXSprite)
     int height = (pSprite->yrepeat*getDudeInfo(pSprite->type)->eyeHeight) << 2;
     int dx = pXSprite->targetX-pSprite->x;
     int dy = pXSprite->targetY-pSprite->y;
-    int UNUSED(nDist) = approxDist(dx, dy);
-    int UNUSED(nAngle) = getangle(dx, dy);
     int x = pSprite->x;
     int y = pSprite->y;
     int z = height;
@@ -583,7 +581,6 @@ static void MoveForward(spritetype *pSprite, XSPRITE *pXSprite)
         pSprite->ang = (pSprite->ang+256)&2047;
     int dx = pXSprite->targetX-pSprite->x;
     int dy = pXSprite->targetY-pSprite->y;
-    int UNUSED(nAngle) = getangle(dx, dy);
     int nDist = approxDist(dx, dy);
     if ((unsigned int)Random(64) < 32 && nDist <= 0x400)
         return;
@@ -621,7 +618,6 @@ static void MoveSlow(spritetype *pSprite, XSPRITE *pXSprite)
     }
     int dx = pXSprite->targetX-pSprite->x;
     int dy = pXSprite->targetY-pSprite->y;
-    int UNUSED(nAngle) = getangle(dx, dy);
     int nDist = approxDist(dx, dy);
     if (Chance(0x600) && nDist <= 0x400)
         return;
@@ -665,7 +661,6 @@ static void MoveSwoop(spritetype *pSprite, XSPRITE *pXSprite)
     }
     int dx = pXSprite->targetX-pSprite->x;
     int dy = pXSprite->targetY-pSprite->y;
-    int UNUSED(nAngle) = getangle(dx, dy);
     int nDist = approxDist(dx, dy);
     if (Chance(0x600) && nDist <= 0x400)
         return;
@@ -708,7 +703,6 @@ static void MoveFly(spritetype *pSprite, XSPRITE *pXSprite)
     }
     int dx = pXSprite->targetX-pSprite->x;
     int dy = pXSprite->targetY-pSprite->y;
-    int UNUSED(nAngle) = getangle(dx, dy);
     int nDist = approxDist(dx, dy);
     if (Chance(0x4000) && nDist <= 0x400)
         return;
diff --git a/source/blood/src/aighost.cpp b/source/blood/src/aighost.cpp
index 64cbd2097..ff1221bec 100644
--- a/source/blood/src/aighost.cpp
+++ b/source/blood/src/aighost.cpp
@@ -121,8 +121,6 @@ static void BlastSeqCallback(int, int nXSprite)
     int height = (pSprite->yrepeat*getDudeInfo(pSprite->type)->eyeHeight) << 2;
     int dx = pXSprite->targetX-pSprite->x;
     int dy = pXSprite->targetY-pSprite->y;
-    int UNUSED(nDist) = approxDist(dx, dy);
-    int UNUSED(nAngle) = getangle(dx, dy);
     int x = pSprite->x;
     int y = pSprite->y;
     int z = height;
@@ -474,7 +472,6 @@ static void MoveForward(spritetype *pSprite, XSPRITE *pXSprite)
         pSprite->ang = (pSprite->ang+256)&2047;
     int dx = pXSprite->targetX-pSprite->x;
     int dy = pXSprite->targetY-pSprite->y;
-    int UNUSED(nAngle) = getangle(dx, dy);
     int nDist = approxDist(dx, dy);
     if ((unsigned int)Random(64) < 32 && nDist <= 0x400)
         return;
@@ -512,7 +509,6 @@ static void MoveSlow(spritetype *pSprite, XSPRITE *pXSprite)
     }
     int dx = pXSprite->targetX-pSprite->x;
     int dy = pXSprite->targetY-pSprite->y;
-    int UNUSED(nAngle) = getangle(dx, dy);
     int nDist = approxDist(dx, dy);
     if (Chance(0x600) && nDist <= 0x400)
         return;
@@ -553,7 +549,6 @@ static void MoveSwoop(spritetype *pSprite, XSPRITE *pXSprite)
     }
     int dx = pXSprite->targetX-pSprite->x;
     int dy = pXSprite->targetY-pSprite->y;
-    int UNUSED(nAngle) = getangle(dx, dy);
     int nDist = approxDist(dx, dy);
     if (Chance(0x600) && nDist <= 0x400)
         return;
@@ -593,7 +588,6 @@ static void MoveFly(spritetype *pSprite, XSPRITE *pXSprite)
     }
     int dx = pXSprite->targetX-pSprite->x;
     int dy = pXSprite->targetY-pSprite->y;
-    int UNUSED(nAngle) = getangle(dx, dy);
     int nDist = approxDist(dx, dy);
     if (Chance(0x4000) && nDist <= 0x400)
         return;
diff --git a/source/blood/src/aigilbst.cpp b/source/blood/src/aigilbst.cpp
index d91a7affb..955838b43 100644
--- a/source/blood/src/aigilbst.cpp
+++ b/source/blood/src/aigilbst.cpp
@@ -294,7 +294,6 @@ static void thinkSwimChase(spritetype *pSprite, XSPRITE *pXSprite)
             if (nDist < pDudeInfo->seeDist && klabs(nDeltaAngle) <= pDudeInfo->periphery)
             {
                 aiSetTarget(pXSprite, pXSprite->target);
-                int UNUSED(floorZ) = getflorzofslope(pSprite->sectnum, pSprite->x, pSprite->y);
                 if (nDist < 0x400 && klabs(nDeltaAngle) < 85)
                     aiNewState(pSprite, pXSprite, &gillBeastSwimBite);
                 else
@@ -327,7 +326,6 @@ static void sub_6CB00(spritetype *pSprite, XSPRITE *pXSprite)
         pSprite->ang = (pSprite->ang+256)&2047;
     int dx = pXSprite->targetX-pSprite->x;
     int dy = pXSprite->targetY-pSprite->y;
-    int UNUSED(nAngle) = getangle(dx, dy);
     int nDist = approxDist(dx, dy);
     if (Random(64) < 32 && nDist <= 0x400)
         return;
@@ -365,7 +363,6 @@ static void sub_6CD74(spritetype *pSprite, XSPRITE *pXSprite)
     int dx = pXSprite->targetX-pSprite->x;
     int dy = pXSprite->targetY-pSprite->y;
     int dz = z2 - z;
-    int UNUSED(nAngle) = getangle(dx, dy);
     int nDist = approxDist(dx, dy);
     if (Chance(0x600) && nDist <= 0x400)
         return;
@@ -401,7 +398,6 @@ static void sub_6D03C(spritetype *pSprite, XSPRITE *pXSprite)
     int dx = pXSprite->targetX-pSprite->x;
     int dy = pXSprite->targetY-pSprite->y;
     int dz = (z2 - z)<<3;
-    int UNUSED(nAngle) = getangle(dx, dy);
     int nDist = approxDist(dx, dy);
     if (Chance(0x4000) && nDist <= 0x400)
         return;
diff --git a/source/blood/src/aiunicult.cpp b/source/blood/src/aiunicult.cpp
index 30fe8e272..11eed6de6 100644
--- a/source/blood/src/aiunicult.cpp
+++ b/source/blood/src/aiunicult.cpp
@@ -991,8 +991,7 @@ void aiGenDudeMoveForward(spritetype* pSprite, XSPRITE* pXSprite ) {
             pSprite->ang = (pSprite->ang + 256) & 2047;
         int dx = pXSprite->targetX - pSprite->x;
         int dy = pXSprite->targetY - pSprite->y;
-        int UNUSED(nAngle) = getangle(dx, dy);
-        int nDist = approxDist(dx, dy);
+         int nDist = approxDist(dx, dy);
         if ((unsigned int)Random(64) < 32 && nDist <= 0x400)
             return;
         int nCos = Cos(pSprite->ang);
diff --git a/source/blood/src/aizomba.cpp b/source/blood/src/aizomba.cpp
index b1761d389..406413605 100644
--- a/source/blood/src/aizomba.cpp
+++ b/source/blood/src/aizomba.cpp
@@ -86,7 +86,6 @@ static void HackSeqCallback(int, int nXSprite)
     DUDEINFO *pDudeInfoT = getDudeInfo(pTarget->type);
     int tx = pXSprite->targetX-pSprite->x;
     int ty = pXSprite->targetY-pSprite->y;
-    int UNUSED(nDist) = approxDist(tx, ty);
     int nAngle = getangle(tx, ty);
     int height = (pSprite->yrepeat*pDudeInfo->eyeHeight)<<2;
     int height2 = (pTarget->yrepeat*pDudeInfoT->eyeHeight)<<2;
diff --git a/source/blood/src/aizombf.cpp b/source/blood/src/aizombf.cpp
index 94ce95593..ee6ae307a 100644
--- a/source/blood/src/aizombf.cpp
+++ b/source/blood/src/aizombf.cpp
@@ -95,7 +95,6 @@ static void PukeSeqCallback(int, int nXSprite)
     int height2 = (pDudeInfoT->eyeHeight*pTarget->yrepeat);
     int tx = pXSprite->targetX-pSprite->x;
     int ty = pXSprite->targetY-pSprite->y;
-    int UNUSED(nDist) = approxDist(tx, ty);
     int nAngle = getangle(tx, ty);
     int dx = Cos(nAngle)>>16;
     int dy = Sin(nAngle)>>16;
diff --git a/source/blood/src/osdcmd.cpp b/source/blood/src/osdcmd.cpp
index 41754ce10..611f74f12 100644
--- a/source/blood/src/osdcmd.cpp
+++ b/source/blood/src/osdcmd.cpp
@@ -130,9 +130,8 @@ static int osdcmd_give(CCmdFuncPtr parm)
     return CCMD_SHOWHELP;
 }
 
-static int osdcmd_god(CCmdFuncPtr UNUSED(parm))
+static int osdcmd_god(CCmdFuncPtr)
 {
-    UNREFERENCED_CONST_PARAMETER(parm);
     if (numplayers == 1 && gamestate == GS_LEVEL)
     {
         SetGodMode(!gMe->godMode);
@@ -144,10 +143,8 @@ static int osdcmd_god(CCmdFuncPtr UNUSED(parm))
     return CCMD_OK;
 }
 
-static int osdcmd_noclip(CCmdFuncPtr UNUSED(parm))
+static int osdcmd_noclip(CCmdFuncPtr)
 {
-    UNREFERENCED_CONST_PARAMETER(parm);
-
     if (numplayers == 1 && gamestate == GS_LEVEL)
     {
         SetClipMode(!gNoClip);
diff --git a/source/blood/src/weapon.cpp b/source/blood/src/weapon.cpp
index 76cd93f5a..e64a95841 100644
--- a/source/blood/src/weapon.cpp
+++ b/source/blood/src/weapon.cpp
@@ -1579,7 +1579,6 @@ void FireNapalm2(int nTrigger, PLAYER *pPlayer)
 void AltFireNapalm(int nTrigger, PLAYER *pPlayer)
 {
     UNREFERENCED_PARAMETER(nTrigger);
-    char UNUSED(bAkimbo) = powerupCheck(pPlayer, kPwUpTwoGuns);
     int nSpeed = mulscale16(0x8000, 0x177777)+0x66666;
     spritetype *pMissile = playerFireThing(pPlayer, 0, -4730, kThingNapalmBall, nSpeed);
     if (pMissile)