diff --git a/code/Starfighter.cpp b/code/Starfighter.cpp
index 18696a7..21acb37 100644
--- a/code/Starfighter.cpp
+++ b/code/Starfighter.cpp
@@ -27,7 +27,7 @@ int main(int argc, char *argv[])
 {
 	defineGlobals(); // Must do this first!
 
-	signed char cheatAttempt = 0;
+	bool cheatAttempt = false;
 
 	if (argc > 1)
 	{
@@ -54,11 +54,11 @@ int main(int argc, char *argv[])
 			{printf("Enemy firing disabled\n"); dev.fireAliens = 0;}
 		#endif
 		if (strcmp(argv[i], "-cheat") == 0)
-			cheatAttempt = 1;
+			cheatAttempt = true;
 		if (strcmp(argv[i], "-noaudio") == 0)
-			{printf("No Audio\n"); engine.useAudio = 0;}
+			{printf("No Audio\n"); engine.useAudio = false;}
 		if (strcmp(argv[i], "-mono") == 0)
-			{printf("Mono sound output\n"); engine.useAudio = 1;}
+			{printf("Mono sound output\n"); engine.useAudio = true;}
 	}
 
 	atexit(cleanUp);
diff --git a/code/aliens.cpp b/code/aliens.cpp
index 3061065..6c9b780 100644
--- a/code/aliens.cpp
+++ b/code/aliens.cpp
@@ -76,7 +76,7 @@ void addDrone(object *host)
 		return;
 
 	enemy[index] = defEnemy[CD_DRONE];
-	enemy[index].active = 1;
+	enemy[index].active = true;
 	enemy[index].face = rand() % 2;
 	enemy[index].owner = &enemy[index]; // Most enemies will own themselves
 	enemy[index].target = &enemy[index];
@@ -101,7 +101,7 @@ void addSmallAsteroid(object *host)
 		addBullet(&weapon[W_ROCKETS], host, 0, 0);
 
 	for (int i = 10 ; i < 20 ; i++)
-		if (enemy[i].active == 0)
+		if (!enemy[i].active)
 			index = i;
 
 	if (index == -1)
@@ -128,7 +128,7 @@ void addSmallAsteroid(object *host)
 
 	enemy[index].x = host->x;
 	enemy[index].y = host->y;
-	enemy[index].active = 1;
+	enemy[index].active = true;
 }
 
 signed char addAlien()
@@ -239,7 +239,7 @@ signed char addAlien()
 	delete[] alienArray;
 
 	enemy[index] = defEnemy[randEnemy];
-	enemy[index].active = 1;
+	enemy[index].active = true;
 	enemy[index].face = rand() % 2;
 	enemy[index].owner = &enemy[index]; // Most enemies will own themselves
 	enemy[index].target = &enemy[index];
@@ -255,7 +255,7 @@ signed char addAlien()
 	{
 		if (placeAlien(&enemy[index]))
 			break;
-		enemy[index].active = 0;
+		enemy[index].active = false;
 
 		return 0;
 	}
@@ -314,7 +314,7 @@ void getPreDefinedAliens()
 		enemy[index].owner = &enemy[index];
 		enemy[index].target = &enemy[index];
 		enemy[index].face = rand() % 2;
-		enemy[index].active = 1;
+		enemy[index].active = true;
 
 		/*
 		we make 1000 attempts to place this enemy since it is required. If after 1000 attempts
@@ -346,7 +346,7 @@ void getPreDefinedAliens()
 
 		if (enemy[index].classDef == CD_CLOAKFIGHTER)
 		{
-			enemy[index].active = 0;
+			enemy[index].active = false;
 			enemy[index].maxShield = enemy[index].shield = 400;
 			enemy[index].flags -= FL_RUNSAWAY;
 			enemy[index].speed = 3;
@@ -354,12 +354,12 @@ void getPreDefinedAliens()
 
 		if ((enemy[index].classDef == CD_MOBILE_RAY) && (index >= 11))
 		{
-			enemy[index].active = 0;
+			enemy[index].active = false;
 		}
 
 		if (enemy[index].classDef == CD_FIREFLY)
 		{
-			enemy[index].active = 0;
+			enemy[index].active = false;
 		}
 
 		if (enemy[index].classDef == CD_BARRIER)
@@ -469,7 +469,7 @@ void addFriendly(int type)
 
 	enemy[type].owner = &enemy[type];
 	enemy[type].target = &enemy[type];
-	enemy[type].active = 1;
+	enemy[type].active = true;
 
 	if (rand() % 2 == 0)
 		enemy[type].x = Math::rrand(400, 550);
@@ -507,7 +507,7 @@ void initAliens()
 {
 	for (int i = 0 ; i < MAX_ALIENS ; i++)
 	{
-		enemy[i].active = 0;
+		enemy[i].active = false;
 		enemy[i].shield = -1;
 		enemy[i].flags = 0;
 	}
@@ -521,7 +521,7 @@ void initAliens()
 		currentGame.hasWingMate1 = 1;
 
 	if (currentGame.area == 11)
-		enemy[WC_KLINE].active = 0;
+		enemy[WC_KLINE].active = false;
 
 	for (int i = 0 ; i < engine.maxAliens ; i++)
 		addAlien();
@@ -546,8 +546,8 @@ void initAliens()
 		case 18:
 		case 24:
 		case 26:
-			enemy[FR_PHOEBE].active = 0;
-			enemy[FR_URSULA].active = 0;
+			enemy[FR_PHOEBE].active = false;
+			enemy[FR_URSULA].active = false;
 			break;
 	}
 
@@ -566,7 +566,7 @@ void initAliens()
 			enemy[WC_KLINE].owner = &enemy[WC_KLINE];
 			enemy[WC_KLINE].target = &player;
 			enemy[WC_KLINE].shield = 100;
-			enemy[WC_KLINE].active = 1;
+			enemy[WC_KLINE].active = true;
 			enemy[WC_KLINE].x = player.x + 1000;
 			enemy[WC_KLINE].y = player.y;
 			setTarget(WC_KLINE);
@@ -580,7 +580,7 @@ void initAliens()
 				enemy[10].owner = &enemy[10];
 				enemy[10].target = &enemy[10];
 				enemy[10].shield = 1000;
-				enemy[10].active = 1;
+				enemy[10].active = true;
 				enemy[10].x = player.x - 1000;
 				enemy[10].y = player.y;
 				setTarget(10);
@@ -1056,7 +1056,7 @@ void doAliens()
 					{
 						theEnemy->flags -= FL_LEAVESECTOR;
 						theEnemy->flags += FL_ESCAPED;
-						theEnemy->active = 0;
+						theEnemy->active = false;
 
 						if (theEnemy->classDef == CD_CLOAKFIGHTER)
 						{
@@ -1201,7 +1201,7 @@ void doAliens()
 				}
 
 				if ((currentGame.area == 24) && (theEnemy->x < -300))
-					theEnemy->active = 0;
+					theEnemy->active = false;
 			}
 			else
 			{
@@ -1213,7 +1213,7 @@ void doAliens()
 				}
 				if (theEnemy->shield < theEnemy->deathCounter)
 				{
-					theEnemy->active = 0;
+					theEnemy->active = false;
 					if ((theEnemy->classDef == CD_BOSS) || (theEnemy->owner == &enemy[WC_BOSS]) || (theEnemy->flags & FL_FRIEND) || (theEnemy->classDef == CD_ASTEROID) || (theEnemy->classDef == CD_KLINE))
 						addDebris((int)theEnemy->x, (int)theEnemy->y, theEnemy->maxShield);
 
diff --git a/code/bullets.cpp b/code/bullets.cpp
index 8866a76..c5b40ad 100644
--- a/code/bullets.cpp
+++ b/code/bullets.cpp
@@ -32,7 +32,7 @@ void addBullet(object *theWeapon, object *attacker, int y, int dy)
 		currentGame.shots++;
 
 	bullet->next = NULL;
-	bullet->active = 1;
+	bullet->active = true;
 	bullet->x = attacker->x - ((attacker->image[0]->w / 2) * attacker->face);
 	bullet->y = attacker->y + y;
 	bullet->flags = theWeapon->flags;
@@ -517,7 +517,7 @@ void doBullets()
 	{
 		bullet = bullet->next;
 
-		if (bullet->active == 1)
+		if (bullet->active)
 		{
 			if (bullet->flags & WF_HOMING)
 			{
@@ -602,7 +602,7 @@ void doBullets()
 
 				if (okayToHit)
 				{
-					if ((bullet->active == 1) && (Collision::collision(bullet, theEnemy)))
+					if ((bullet->active) && (Collision::collision(bullet, theEnemy)))
 					{
 						if (bullet->owner == &player)
 						{
@@ -654,14 +654,14 @@ void doBullets()
 
 						if (bullet->id != WT_CHARGER)
 						{
-							bullet->active = 0;
+							bullet->active = false;
 							bullet->shield = 0;
 						}
 						else if (bullet->id == WT_CHARGER)
 						{
 							bullet->shield -= theEnemy->shield;
 							if (bullet->shield < 0)
-								bullet->active = 0;
+								bullet->active = false;
 						}
 
 						playSound(SFX_HIT);
@@ -695,7 +695,7 @@ void doBullets()
 			// Check for bullets hitting player
 			if ((bullet->flags & WF_WEAPCO) || (bullet->id == WT_ROCKET) || (bullet->id == WT_LASER) || (bullet->id == WT_CHARGER))
 			{
-				if ((bullet->active == 1) && (player.shield > 0) && (Collision::collision(bullet, &player)) && (bullet->owner != &player))
+				if ((bullet->active) && (player.shield > 0) && (Collision::collision(bullet, &player)) && (bullet->owner != &player))
 				{
 					if ((!engine.cheatShield) || (engine.missionCompleteTimer != 0))
 					{
@@ -716,14 +716,14 @@ void doBullets()
 
 					if (bullet->id != WT_CHARGER)
 					{
-						bullet->active = 0;
+						bullet->active = false;
 						bullet->shield = 0;
 					}
 					else if (bullet->id == WT_CHARGER)
 					{
 						bullet->shield -= theEnemy->shield;
 						if (bullet->shield < 0)
-							bullet->active = 0;
+							bullet->active = false;
 					}
 
 					playSound(SFX_HIT);
@@ -745,12 +745,12 @@ void doBullets()
 				{
 					if (Collision::collision(bullet, theCargo))
 					{
-						bullet->active = 0;
+						bullet->active = false;
 						addExplosion(bullet->x, bullet->y, E_SMALL_EXPLOSION);
 						playSound(SFX_HIT);
 						if (theCargo->collectType != P_PHOEBE)
 						{
-							theCargo->active = 0;
+							theCargo->active = false;
 							playSound(SFX_EXPLOSION);
 							for (int i = 0 ; i < 10 ; i++)
 								addExplosion(theCargo->x + Math::rrand(-15, 15), theCargo->y + Math::rrand(-15, 15), E_BIG_EXPLOSION);
@@ -778,10 +778,10 @@ void doBullets()
 					if (checkPlayerShockDamage(bullet->x, bullet->y))
 						setInfoLine("Warning: Missile Shockwave Damage!!", FONT_RED);
 			}
-			bullet->active = 0;
+			bullet->active = false;
 		}
 
-		if (bullet->active == 1)
+		if (bullet->active)
 		{
 			prevBullet = bullet;
 			engine.bulletTail = bullet;
diff --git a/code/cargo.cpp b/code/cargo.cpp
index 77b556f..5d5a12f 100644
--- a/code/cargo.cpp
+++ b/code/cargo.cpp
@@ -24,7 +24,7 @@ void initCargo()
 {
 	for (int i = 0 ; i < MAX_CARGO ; i++)
 	{
-		cargo[i].active = 0;
+		cargo[i].active = false;
 		cargo[i].owner = NULL;
 	}
 }
@@ -36,7 +36,7 @@ int getCargo()
 {
 	for (int i = 0 ; i < MAX_CARGO ; i++)
 	{
-		if (cargo[i].active == 0)
+		if (!cargo[i].active)
 			return i;
 	}
 
@@ -50,7 +50,7 @@ object *addCargo(object *owner, int cargoType)
 	if (index == -1)
 		return NULL;
 
-	cargo[index].active = 1;
+	cargo[index].active = false;
 	cargo[index].owner = owner;
 	cargo[index].x = owner->x;
 	cargo[index].y = owner->y;
@@ -72,13 +72,13 @@ void becomeCollectable(int i)
 	}
 	else
 	{
-		enemy[FR_PHOEBE].active = 1;
+		enemy[FR_PHOEBE].active = true;
 		enemy[FR_PHOEBE].x = cargo[i].x;
 		enemy[FR_PHOEBE].y = cargo[i].y;
 		setRadioMessage(FACE_PHOEBE, "Thanks!! Watch out, WEAPCO! Phoebe's loose and she's ANGRY!!!", 1);
 	}
 
-	cargo[i].active = 0;
+	cargo[i].active = false;
 }
 
 void doCargo()
diff --git a/code/collectable.cpp b/code/collectable.cpp
index ceb4763..428b4d1 100644
--- a/code/collectable.cpp
+++ b/code/collectable.cpp
@@ -89,7 +89,7 @@ void addCollectable(float x, float y, int type, int value, int life)
 	collectables *collectable = new collectables;
 
 	collectable->next = NULL;
-	collectable->active = 1;
+	collectable->active = true;
 	collectable->x = x;
 	collectable->y = y;
 
@@ -187,17 +187,17 @@ void checkMineBulletCollisions(object *bullet)
 		{
 			if (Collision::collision(collectable, bullet))
 			{
-				collectable->active = 0;
+				collectable->active = false;
 				
 				if (bullet->id != WT_CHARGER)
 				{
-					bullet->active = 0;
+					bullet->active = false;
 				}
 				else
 				{
 					bullet->shield--;
 					if (bullet->shield < 0)
-						bullet->active = 0;
+						bullet->active = false;
 				}
 
 				if (bullet->owner == &player)
@@ -208,7 +208,7 @@ void checkMineBulletCollisions(object *bullet)
 			}
 		}
 
-		if (collectable->active == 1)
+		if (collectable->active)
 		{
 			prevCollectable = collectable;
 			engine.collectableTail = collectable;
@@ -240,7 +240,7 @@ void doCollectables()
 	{
 		collectable = collectable->next;
 
-		if (collectable->active == 1)
+		if (collectable->active)
 		{
 			if ((collectable->x + collectable->image->w > 0) && (collectable->x < 800) && (collectable->y + collectable->image->h > 0) && (collectable->y < 600))
 				graphics.blit(collectable->image, (int)collectable->x, (int)collectable->y);
@@ -386,7 +386,7 @@ void doCollectables()
 
 				updateMissionRequirements(M_COLLECT, collectable->type, collectable->value);
 
-				collectable->active = 0;
+				collectable->active = false;
 				if (collectable->type != P_MINE)
 				{
 					setInfoLine(temp, FONT_WHITE);
@@ -407,12 +407,12 @@ void doCollectables()
 
 		if (collectable->life < 1)
 		{
-			collectable->active = 0;
+			collectable->active = false;
 			if ((collectable->type == P_CARGO) || (collectable->type == P_ESCAPEPOD) || (collectable->type == P_SLAVES))
 				updateMissionRequirements(M_PROTECT_PICKUP, collectable->type, 1);
 		}
 
-		if (collectable->active == 1)
+		if (collectable->active)
 		{
 			prevCollectable = collectable;
 			engine.collectableTail = collectable;
diff --git a/code/events.cpp b/code/events.cpp
index 24286bd..18af7c8 100644
--- a/code/events.cpp
+++ b/code/events.cpp
@@ -31,7 +31,7 @@ signed char checkPauseRequest()
 		
 	if (engine.keyState[SDLK_ESCAPE])
 	{
-		engine.paused = 0;
+		engine.paused = false;
 		engine.done = 1;
 		player.shield = 0;
 		return 1;
@@ -39,7 +39,7 @@ signed char checkPauseRequest()
 	
 	if (engine.keyState[SDLK_p])
 	{
-		engine.paused = 0;
+		engine.paused = false;
 		engine.keyState[SDLK_p] = 0;
 	}
 
@@ -49,10 +49,10 @@ signed char checkPauseRequest()
 void compareLastKeyInputs()
 {
 	if (strstr(lastKeyEvents, "humansdoitbetter") != NULL)
-		{engine.cheat = 1; memset(lastKeyEvents, ' ', 25);}
+		{engine.cheat = true; memset(lastKeyEvents, ' ', 25);}
 
 	if (strstr(lastKeyEvents, "credits") != NULL)
-		{engine.cheatCredits = 1; memset(lastKeyEvents, ' ', 25);}
+		{engine.cheatCredits = true; memset(lastKeyEvents, ' ', 25);}
 }
 
 void addKeyEvent(const char *keyName)
diff --git a/code/explosions.cpp b/code/explosions.cpp
index 0d3f53a..0e8020a 100644
--- a/code/explosions.cpp
+++ b/code/explosions.cpp
@@ -31,7 +31,7 @@ void addExplosion(float x, float y, int type)
 	object *explosion = new object;
 
 	explosion->next = NULL;
-	explosion->active = 1;
+	explosion->active = true;
 	explosion->x = x;
 	explosion->y = y;
 	explosion->thinktime = 28;
@@ -74,7 +74,7 @@ void doExplosions()
 	{
 		explosion = explosion->next;
 
-		if (explosion->active == 1)
+		if (explosion->active)
 		{
 			explosion->x += engine.ssx;
 			explosion->y += engine.ssy;
@@ -88,7 +88,7 @@ void doExplosions()
 
 				if(explosion->thinktime < 1)
 				{
-					explosion->active = 0;
+					explosion->active = false;
 				}
 				else
 				{
@@ -98,7 +98,7 @@ void doExplosions()
 			}
 		}
 
-		if (explosion->active == 1)
+		if (explosion->active)
 		{
 			prevExplosion = explosion;
 			engine.explosionTail = explosion;
diff --git a/code/game.cpp b/code/game.cpp
index de4a949..701a7e8 100644
--- a/code/game.cpp
+++ b/code/game.cpp
@@ -29,8 +29,8 @@ void newGame()
 
 	if (!engine.useAudio)
 	{
-		currentGame.useSound = 0;
-		currentGame.useMusic = 0;
+		currentGame.useSound = false;
+		currentGame.useMusic = false;
 	}
 
 	currentGame.autoSaveSlot = -1;
diff --git a/code/globals.cpp b/code/globals.cpp
index 06e6992..a1abbc6 100644
--- a/code/globals.cpp
+++ b/code/globals.cpp
@@ -23,7 +23,7 @@ Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 void defineGlobals()
 {
 	engine.musicVolume = 100;
-	engine.useAudio = 2;
+	engine.useAudio = true;
 
    engine.maxAliens = 9;
 
@@ -58,16 +58,16 @@ void defineGlobals()
 	engine.counter = 0;
 	engine.seconds = 0;
 	engine.minutes = 0;
-	engine.paused = 0;
+	engine.paused = false;
 	engine.gameSection = SECTION_TITLE;
 	
 	engine.targetArrow = -1;
 	engine.targetArrowTimer = 0;
 
-	engine.cheat = 0;
-	engine.cheatShield = 0;
-	engine.cheatAmmo = 0;
-	engine.cheatCash = 0;
+	engine.cheat = false;
+	engine.cheatShield = false;
+	engine.cheatAmmo = false;
+	engine.cheatCash = false;
 
    // All Development Stuff...
 	dev.moveAliens = 1;
diff --git a/code/init.cpp b/code/init.cpp
index a06ed03..a84ba3c 100644
--- a/code/init.cpp
+++ b/code/init.cpp
@@ -159,10 +159,6 @@ void initSystem()
 		exit(1);
 	}
 
-	currentGame.useSound = 1;
-	currentGame.useMusic = 1;
-	currentGame.fullScreen = 0;
-
 	char filename[PATH_MAX];
 	int fullScreen = 0, useSound = 1, useMusic = 1;
 
@@ -199,7 +195,7 @@ void initSystem()
 		{
 			printf("Warning: Couldn't set 22050 Hz 16-bit audio - Reason: %s\n", Mix_GetError());
 			printf("Sound and Music will be disabled\n");
-			engine.useAudio = 0;
+			engine.useAudio = false;
 		}
 	}
 
diff --git a/code/intermission.cpp b/code/intermission.cpp
index 8f7609c..37a6d95 100644
--- a/code/intermission.cpp
+++ b/code/intermission.cpp
@@ -396,15 +396,15 @@ void showOptions(SDL_Surface *optionsSurface)
 	if ((engine.keyState[SDLK_LCTRL]) || (engine.keyState[SDLK_RCTRL]))
 	{
 		if (Collision::collision(engine.cursor_x + 13, engine.cursor_y + 13, 6, 6, 417, 172, 45, 22))
-			currentGame.useSound = 1;
+			currentGame.useSound = true;
 
 		if (Collision::collision(engine.cursor_x + 13, engine.cursor_y + 13, 6, 6, 478, 172, 45, 22))
-			currentGame.useSound = 0;
+			currentGame.useSound = false;
 
 
 		if (Collision::collision(engine.cursor_x + 13, engine.cursor_y + 13, 6, 6, 417, 222, 45, 22))
 		{
-			currentGame.useMusic = 1;
+			currentGame.useMusic = true;
 			if (engine.useAudio)
 			{
 				if (Mix_PausedMusic() == 1)
@@ -416,7 +416,7 @@ void showOptions(SDL_Surface *optionsSurface)
 
 		if (Collision::collision(engine.cursor_x + 13, engine.cursor_y + 13, 6, 6, 478, 222, 45, 22))
 		{
-			currentGame.useMusic = 0;
+			currentGame.useMusic = false;
 			if (engine.useAudio)
 				Mix_PauseMusic();
 		}
@@ -432,7 +432,7 @@ void showOptions(SDL_Surface *optionsSurface)
 				graphics.drawBackground();
 				flushBuffer();
 				#endif
-				currentGame.fullScreen = 1;
+				currentGame.fullScreen = true;
 			}
 		}
 
@@ -447,7 +447,7 @@ void showOptions(SDL_Surface *optionsSurface)
 				graphics.drawBackground();
 				flushBuffer();
 				#endif
-				currentGame.fullScreen = 0;
+				currentGame.fullScreen = false;
 			}
 		}
 		
diff --git a/code/missions.cpp b/code/missions.cpp
index bace794..a4b0f7c 100644
--- a/code/missions.cpp
+++ b/code/missions.cpp
@@ -497,7 +497,7 @@ char revealHiddenObjectives()
 		{
 			killAllAliens();
 			syncScriptEvents();
-			enemy[WC_KLINE].active = 1;
+			enemy[WC_KLINE].active = true;
 			enemy[WC_KLINE].x = player.x + 1000;
 			enemy[WC_KLINE].y = player.y;
 			enemy[WC_KLINE].flags += FL_IMMORTAL + FL_NOFIRE;
diff --git a/code/player.cpp b/code/player.cpp
index 35d415a..0640c60 100644
--- a/code/player.cpp
+++ b/code/player.cpp
@@ -25,7 +25,7 @@ Initialises the player for a new game.
 */
 void initPlayer()
 {
-	player.active = 1;
+	player.active = true;
 	player.x = 200;
 	player.y = 200;
 	player.speed = 2;
@@ -234,7 +234,7 @@ void doPlayer()
 
 			if (engine.keyState[SDLK_p])
 			{
-				engine.paused = 1;
+				engine.paused = true;
 				engine.keyState[SDLK_p] = 0;
 			}
 
@@ -286,7 +286,7 @@ void doPlayer()
 		}
 		else
 		{
-			player.active = 0;
+			player.active = false;
 			player.shield--;
 			if (player.shield == -1)
 			{
@@ -374,7 +374,7 @@ void getPlayerInput()
 				engine.keyState[engine.event.key.keysym.sym] = 1;
 
 				if (engine.gameSection != SECTION_GAME)
-					engine.paused = 0;
+					engine.paused = false;
 
 				break;
 
diff --git a/code/script.cpp b/code/script.cpp
index b88cee9..2895db2 100644
--- a/code/script.cpp
+++ b/code/script.cpp
@@ -111,7 +111,7 @@ void checkScriptEvents()
 				}
 				else
 				{
-					enemy[gameEvent[i].entity].active = 1;
+					enemy[gameEvent[i].entity].active = true;
 					enemy[gameEvent[i].entity].x = Math::rrand((int)player.x + 400, (int)player.x + 800);
 					enemy[gameEvent[i].entity].y = Math::rrand((int)player.y - 400, (int)player.y + 800);
 				}
@@ -175,7 +175,7 @@ void setScene(int scene)
 			enemy[index].x = x;
 			enemy[index].y = y;
 			enemy[index].dx = speed;
-			enemy[index].active = 1;
+			enemy[index].active = true;
 		}
 	}
 
@@ -215,7 +215,7 @@ void doCutscene(int scene)
 	{
 		enemy[i] = defEnemy[0];
 		enemy[i].face = 0;
-		enemy[i].active = 0;
+		enemy[i].active = false;
 	}
 
 	for (int i = 0 ; i < 10 ; i++)
diff --git a/code/structs.h b/code/structs.h
index ba7f4c9..167f656 100644
--- a/code/structs.h
+++ b/code/structs.h
@@ -20,7 +20,7 @@ Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 
 struct object {
 
-	signed char active;
+	bool active;
 	signed char classDef; // Used by aliens to determine what they are
 	signed char AIType; // Type of articifial intelligence
 
@@ -98,7 +98,7 @@ struct Star {
 
 struct collectables {
 
-	signed char active;
+	bool active;
 	float x, y, dx, dy;
 	SDL_Surface *image;
 	signed char type; // What kind of collectable is it?
@@ -130,9 +130,9 @@ struct Game {
 	unsigned char musicVolume;
 	unsigned char sfxVolume;
 
-	signed char fullScreen;
-	signed char useMusic;
-	signed char useSound;
+	bool fullScreen;
+	bool useMusic;
+	bool useSound;
 	signed char autoSaveSlot;
 
 	unsigned int cash;
@@ -261,22 +261,22 @@ struct globalEngineVariables {
 	signed char allAliensDead;
 	int addAliens;
 
-	signed char paused;
+	bool paused;
 	signed char gameSection;
 
-	signed char useAudio;
+	bool useAudio;
 
 	// This really only applies to Linux users.
 	char userHomeDirectory[1024];
 	
 	char keyState[350];
 
-	signed char cheat; // overall cheat
-	signed char cheatShield;
-	signed char cheatCash;
-	signed char cheatAmmo;
-	signed char cheatTime;
-	signed char cheatCredits;
+	bool cheat; // overall cheat
+	bool cheatShield;
+	bool cheatCash;
+	bool cheatAmmo;
+	bool cheatTime;
+	bool cheatCredits;
 };
 
 struct event {
diff --git a/code/title.cpp b/code/title.cpp
index 14a00ca..ac985d5 100644
--- a/code/title.cpp
+++ b/code/title.cpp
@@ -346,7 +346,7 @@ int doTitle()
 		if (engine.cheatCredits)
 		{
 			doCredits();
-			engine.cheatCredits = 0;
+			engine.cheatCredits = false;
 		}
 
 		if ((engine.keyState[SDLK_LCTRL]) || (engine.keyState[SDLK_RCTRL]) || (engine.keyState[SDLK_SPACE]))
@@ -389,10 +389,10 @@ int doTitle()
 
 					case 2:
 						if ((selectedOption == 1) && (engine.useAudio))
-							currentGame.useSound = 1 - currentGame.useSound;
+							currentGame.useSound = !currentGame.useSound;
 						else if ((selectedOption == 2) && (engine.useAudio))
 						{
-							currentGame.useMusic = 1 - currentGame.useMusic;
+							currentGame.useMusic = !currentGame.useMusic;
 
 							if (currentGame.useMusic)
 							{
@@ -408,7 +408,7 @@ int doTitle()
 						}
 						else if (selectedOption == 3)
 						{
-							currentGame.fullScreen = 1 - currentGame.fullScreen;
+							currentGame.fullScreen = !currentGame.fullScreen;
 							#if LINUX
 							SDL_WM_ToggleFullScreen(graphics.screen);
 							#else
@@ -430,13 +430,13 @@ int doTitle()
 
 					case 3:
 						if (selectedOption == 1)
-							engine.cheatShield = 1 - engine.cheatShield;
+							engine.cheatShield = !engine.cheatShield;
 						else if (selectedOption == 2)
-							engine.cheatAmmo = 1 - engine.cheatAmmo;
+							engine.cheatAmmo = !engine.cheatAmmo;
 						else if (selectedOption == 3)
-							engine.cheatCash = 1 - engine.cheatCash;
+							engine.cheatCash = !engine.cheatCash;
 						else if (selectedOption == 4)
-							engine.cheatTime = 1 - engine.cheatTime;
+							engine.cheatTime = !engine.cheatTime;
 						else if (selectedOption == listLength)
 							{menuType = 0; selectedOption = 1;}
 						createCheatMenu();