diff --git a/source/games/blood/src/_polymost.cpp b/source/games/blood/src/_polymost.cpp
index 20f396b64..5d687df6e 100644
--- a/source/games/blood/src/_polymost.cpp
+++ b/source/games/blood/src/_polymost.cpp
@@ -182,7 +182,7 @@ RORHACK:
 }
 
 // hack the portal planes with the sky flag for rendering. Only Polymost needs this hack.
-void setPortalFlags(char mode)
+void setPortalFlags(int mode)
 {
     for (int i = mirrorcnt - 1; i >= 0; i--)
     {
diff --git a/source/games/blood/src/actor.cpp b/source/games/blood/src/actor.cpp
index 4c17758ba..d343ad576 100644
--- a/source/games/blood/src/actor.cpp
+++ b/source/games/blood/src/actor.cpp
@@ -2446,15 +2446,12 @@ static void actInitDudes()
 	{
 		// by NoOne: WTF is this?
 		///////////////
-		char unk[kDudeMax - kDudeBase];
-		memset(unk, 0, sizeof(unk));
 		BloodStatIterator it(kStatDude);
 		while (auto act = it.Next())
 		{
 			spritetype* pSprite = &act->s();
 			if (pSprite->type < kDudeBase || pSprite->type >= kDudeMax)
 				I_Error("Non-enemy sprite (%d) in the enemy sprite list.\n", act->GetIndex());
-			unk[pSprite->type - kDudeBase] = 1;
 		}
 
 		gKillMgr.CountTotalKills();
@@ -6206,7 +6203,7 @@ static void actCheckDudes()
 
 				if (pPlayer->isUnderwater)
 				{
-					char bActive = packItemActive(pPlayer, 1);
+					bool bActive = packItemActive(pPlayer, 1);
 
 					if (bActive || pPlayer->godMode) pPlayer->underwaterTime = 1200;
 					else pPlayer->underwaterTime = ClipLow(pPlayer->underwaterTime - 4, 0);
@@ -6722,7 +6719,7 @@ DBloodActor* actFireMissile(DBloodActor* actor, int a2, int a3, int a4, int a5,
 {
 
 	assert(nType >= kMissileBase && nType < kMissileMax);
-	char v4 = 0;
+	bool impact = false;
 	auto pSprite = &actor->s();
 	const MissileType* pMissileInfo = &missileInfo[nType - kMissileBase];
 	int x = pSprite->x + MulScale(a2, Cos(pSprite->ang + 512), 30);
@@ -6736,7 +6733,7 @@ DBloodActor* actFireMissile(DBloodActor* actor, int a2, int a3, int a4, int a5,
 	{
 		if (hit == 3 || hit == 0)
 		{
-			v4 = 1;
+			impact = true;
 			x = gHitInfo.hitx - MulScale(Cos(pSprite->ang), 16, 30);
 			y = gHitInfo.hity - MulScale(Sin(pSprite->ang), 16, 30);
 		}
@@ -6768,7 +6765,7 @@ DBloodActor* actFireMissile(DBloodActor* actor, int a2, int a3, int a4, int a5,
 
 	actBuildMissile(spawned, actor);
 
-	if (v4)
+	if (impact)
 	{
 		actImpactMissile(spawned, hit);
 		return nullptr;
diff --git a/source/games/blood/src/actor.h b/source/games/blood/src/actor.h
index 55ebc3627..e4b7925ea 100644
--- a/source/games/blood/src/actor.h
+++ b/source/games/blood/src/actor.h
@@ -134,8 +134,8 @@ struct MissileType
 struct EXPLOSION
 {
     uint8_t repeat;
-    char dmg;
-    char dmgRng;
+    uint8_t dmg;
+    uint8_t dmgRng;
     int radius;
     int dmgType;
     int burnTime;
diff --git a/source/games/blood/src/ai.cpp b/source/games/blood/src/ai.cpp
index 5229abe93..ee16dd686 100644
--- a/source/games/blood/src/ai.cpp
+++ b/source/games/blood/src/ai.cpp
@@ -1265,7 +1265,7 @@ void RecoilDude(DBloodActor* actor)
 {
 	auto pXSprite = &actor->x();
 	auto pSprite = &actor->s();
-	char v4 = Chance(0x8000);
+	uint8_t v4 = Chance(0x8000);
 	DUDEEXTRA* pDudeExtra = &actor->dudeExtra;
 	if (pSprite->statnum == kStatDude && (pSprite->type >= kDudeBase && pSprite->type < kDudeMax))
 	{
diff --git a/source/games/blood/src/ai.h b/source/games/blood/src/ai.h
index 9af27d885..6f4e35c01 100644
--- a/source/games/blood/src/ai.h
+++ b/source/games/blood/src/ai.h
@@ -57,13 +57,13 @@ struct DUDEEXTRA_STATS
         int thinkTime;
         int birthCounter;
     };
-    char active;
+	uint8_t active;
 };
 
 struct DUDEEXTRA
 {
     int time;
-    char teslaHit;
+    uint8_t teslaHit;
     int prio;
     DUDEEXTRA_STATS stats;
 };
diff --git a/source/games/blood/src/aibeast.cpp b/source/games/blood/src/aibeast.cpp
index c5f51bb13..2f531afd0 100644
--- a/source/games/blood/src/aibeast.cpp
+++ b/source/games/blood/src/aibeast.cpp
@@ -95,20 +95,15 @@ void StompSeqCallback(int, DBloodActor* actor1)
 	int v10 = 25 + 30 * gGameOptions.nDifficulty;
 	const bool newSectCheckMethod = !cl_bloodvanillaenemies && !VanillaMode(); // use new sector checking logic
 	GetClosestSpriteSectors(nSector, x, y, vc, sectmap, nullptr, newSectCheckMethod);
-	char v4 = 0;
 	int hit = HitScan(actor1, pSprite->z, dx, dy, 0, CLIPMASK1, 0);
 	DBloodActor* actor2 = nullptr;
 	actHitcodeToData(hit, &gHitInfo, &actor2);
-	if (hit == 3 && actor2)
-	{
-		if (actor2->s().statnum == kStatDude)
-			v4 = 0;
-	}
+
 	vc <<= 4;
 	BloodStatIterator it1(kStatDude);
 	while (auto actor2 = it1.Next())
 	{
-		if (actor1 != actor2 || v4)
+		if (actor1 != actor2)
 		{
 			spritetype* pSprite2 = &actor2->s();
             if (actor2->hasX())
diff --git a/source/games/blood/src/aicult.cpp b/source/games/blood/src/aicult.cpp
index 4354b4ee3..223346d93 100644
--- a/source/games/blood/src/aicult.cpp
+++ b/source/games/blood/src/aicult.cpp
@@ -130,7 +130,7 @@ void cultThrowSeqCallback(int, DBloodActor* actor)
 	int nMissile = kThingArmedTNTStick;
 	if (gGameOptions.nDifficulty > 2)
 		nMissile = kThingArmedTNTBundle;
-	char v4 = Chance(0x6000);
+	uint8_t v4 = Chance(0x6000);
 	sfxPlay3DSound(actor, 455, -1, 0);
 	if (!actor->ValidateTarget(__FUNCTION__)) return;
 	spritetype* pTarget = &actor->GetTarget()->s();
@@ -178,15 +178,15 @@ void sub_68230(int, DBloodActor* actor)
 	pMissile->x().Impact = 1;
 }
 
-static char TargetNearExplosion(spritetype* pSprite)
+static bool TargetNearExplosion(spritetype* pSprite)
 {
 	BloodSectIterator it(pSprite->sectnum);
 	while (auto actor = it.Next())
 	{
 		if (actor->s().type == kThingArmedTNTStick || actor->s().statnum == kStatExplosion)
-			return 1;
+			return true;
 	}
-	return 0;
+	return false;
 }
 
 static void cultThinkSearch(DBloodActor* actor)
diff --git a/source/games/blood/src/aispid.cpp b/source/games/blood/src/aispid.cpp
index dc9ba2235..70401c72f 100644
--- a/source/games/blood/src/aispid.cpp
+++ b/source/games/blood/src/aispid.cpp
@@ -44,7 +44,7 @@ AISTATE spidBite = { kAiStateChase, 6, nSpidBiteClient, 60, NULL, NULL, NULL, &s
 AISTATE spidJump = { kAiStateChase, 8, nSpidJumpClient, 60, NULL, aiMoveForward, NULL, &spidChase };
 AISTATE spidBirth = { kAiStateOther, 0, nSpidBirthClient, 60, NULL, NULL, NULL, &spidIdle };
 
-static char spidBlindEffect(DBloodActor* dudeactor, int nBlind, int max)
+static void spidBlindEffect(DBloodActor* dudeactor, int nBlind, int max)
 {
 	spritetype* pDude = &dudeactor->s();
 	if (IsPlayerSprite(pDude))
@@ -55,10 +55,8 @@ static char spidBlindEffect(DBloodActor* dudeactor, int nBlind, int max)
 		if (pPlayer->blindEffect < max)
 		{
 			pPlayer->blindEffect = ClipHigh(pPlayer->blindEffect + nBlind, max);
-			return 1;
 		}
 	}
-	return 0;
 }
 
 void SpidBiteSeqCallback(int, DBloodActor* actor)
diff --git a/source/games/blood/src/animatesprite.cpp b/source/games/blood/src/animatesprite.cpp
index c8bb5bb84..be49e05ab 100644
--- a/source/games/blood/src/animatesprite.cpp
+++ b/source/games/blood/src/animatesprite.cpp
@@ -440,7 +440,7 @@ static tspritetype *viewAddEffect(spritetype* tsprite, int& spritesortcnt, int n
         pNSprite->y = pTSprite->y;
         pNSprite->z = pSector->floorz;
         pNSprite->picnum = 624;
-        char nShade = (pSector->floorz-pTSprite->z)>>8; 
+        uint8_t nShade = (pSector->floorz-pTSprite->z)>>8;
         pNSprite->shade = nShade-32;
         pNSprite->pal = 2;
         pNSprite->xrepeat = pNSprite->yrepeat = nShade;
diff --git a/source/games/blood/src/loadsave.cpp b/source/games/blood/src/loadsave.cpp
index effb75605..3d7426e8b 100644
--- a/source/games/blood/src/loadsave.cpp
+++ b/source/games/blood/src/loadsave.cpp
@@ -441,7 +441,7 @@ FSerializer& Serialize(FSerializer& arc, const char* keyname, AISTATE*& w, AISTA
 FSerializer& Serialize(FSerializer& arc, const char* keyname, DUDEEXTRA& w, DUDEEXTRA* def)
 {
 	int empty = 0;
-	char empty2 = 0;
+	uint8_t empty2 = 0;
 	if (arc.isReading()) w = {};
 
 	if (arc.BeginObject(keyname))
diff --git a/source/games/blood/src/misc.h b/source/games/blood/src/misc.h
index a8c2c8774..edba869fe 100644
--- a/source/games/blood/src/misc.h
+++ b/source/games/blood/src/misc.h
@@ -37,7 +37,7 @@ void FireInit(void);
 void FireProcess(void);
 void UpdateNetworkMenus(void); 
 void InitMirrors(void);
-void setPortalFlags(char mode);
+void setPortalFlags(int mode);
 void processSpritesOnOtherSideOfPortal(int x, int y, int interpolation);
 void DrawMirrors(int x, int y, int z, fixed_t a, fixed_t horiz, int smooth, int viewPlayer);
 int qanimateoffs(int a1, int a2);
diff --git a/source/games/blood/src/player.cpp b/source/games/blood/src/player.cpp
index a0be1b166..cba5b8e72 100644
--- a/source/games/blood/src/player.cpp
+++ b/source/games/blood/src/player.cpp
@@ -464,7 +464,7 @@ int packCheckItem(PLAYER *pPlayer, int nPack)
     return pPlayer->packSlots[nPack].curAmount;
 }
 
-char packItemActive(PLAYER *pPlayer, int nPack)
+bool packItemActive(PLAYER *pPlayer, int nPack)
 {
     return pPlayer->packSlots[nPack].isActive;
 }
diff --git a/source/games/blood/src/player.h b/source/games/blood/src/player.h
index 011852e32..5a08a24e8 100644
--- a/source/games/blood/src/player.h
+++ b/source/games/blood/src/player.h
@@ -247,7 +247,7 @@ int packItemToPowerup(int nPack);
 int powerupToPackItem(int nPowerUp);
 char packAddItem(PLAYER *pPlayer, unsigned int nPack);
 int packCheckItem(PLAYER *pPlayer, int nPack);
-char packItemActive(PLAYER *pPlayer, int nPack);
+bool packItemActive(PLAYER *pPlayer, int nPack);
 void packUseItem(PLAYER *pPlayer, int nPack);
 void packPrevItem(PLAYER *pPlayer);
 void packNextItem(PLAYER *pPlayer);