Select "Options" at the main menu and "Cheat", then activate the following cheats by entering the corresponding codes. Note: Enabling codes will disable game saves. that you will be unable to save upon activation:
CHEAT FUNCTION - CHEAT CODE Level select - RMTE All characters in multiplayer mode - CAST All costumes - WRDB One shot kills - MNKY All weapons in multi-player mode - DKSD All weapons in single player mode - GTSM Maximum money - PWTR Unlimited ammunition - GGTY
ACHIEVEMENT - HOW TO UNLOCK Bestest Infiltrator - Win an Infiltration map. Big Dipper - Earn all 21 stars in challenge mode. Bipolar - Switch between Brian and Stewie 10 times in Story mode. Bird Is The Word - Taunt 5 times in a row with Peter. Boom Headshot - Kill 75 enemies with headshots. Bunch of Chumps - Survive 15 waves of enemies in Multiverse Madness. Cartoon Apocalypse - Survive 30 waves in Multiverse Madness. Chicken Fight! - Complete the "Chicken Fight!" level. Chickens In Space - Complete the "Chickens In Space" level. Day Labor - Destroy all of the piñatas. Employee of the Month - Kill Vernon. First Kill - Successfully complete your first kill of a member of the opposing team in Multiplayer. Grease Can't Save You Now - Win a Capture the "Greased-Up Deaf Guy" match. Handicapable - Complete the "Handicapable" level. Head Shot - Kill an enemy with a single shot to the head. Help From My Friends - Acquire any collectible special inventory items and use it 25 times in Story Mode. How Do I Jump? - Kill yourself with a grenade or satchel charge. IEDead - Kill 60 enemies with grenades/explosives. It's All Greek To Me - Complete the "It's All Greek To Me" level. Justified - Kill 500 enemies using Brian. Kings of Quahog - Win a deathmatch mode (free-for-all or as a team). Little Dipper - Earn 10 stars in challenge mode. Lockdown - Shut out the other team from scoring in Capture the "Greased-Up Deaf Guy". Long John Peter - Complete the "Long John Peter" level. Mort Will Now Lend You Credit - Buy everything available in the Store. Mr. Unpopular - Select Meg as a character for a Multiplayer match. Multi-kill - Perform a multi-kill with a melee weapon. Multi-kill with grenade - Perform a multi-kill with a grenade. No Cheese, Please - Complete the "No Cheese, Please" level. No Place Like Home - Complete the "No Place Like Home" level. Obsessed - Complete all secondary objectives. One Shot Kills - Successfully kill an enemy with one shot. Penny Pincher - Successfully collect $50,000. Pervert - Hang around Quagmire in a baby costume for 30 seconds. Pussy Whipped - Complete the "Pussy Whipped" level. Roadhouse - Kill 3 members of the opposing team with a melee attack before you die in Multiplayer. Santa's Sweatshop - Complete the "Santa's Sweatshop" level. Scorched Earth - Burn the Amish pot fields. Shut Up Meg - Kill Meg during a Multiplayer Match. Something's Amish - Complete the "Something's Amish" level. Stewie-nator - Kill 500 enemies using Stewie. Teabag a D-Bag - Taunt a dead opponent with Quagmire in Multiplayer. Teabaggin' - Successfully perform a taunt 25 times. The Cleaner - Get a 10 kill streak in Deathmatch. There Is No Cake - Unlock all other Achievements found in the game. Ugly Tastes Terrible - Play poorly during the final showdown. We Be Clubbing - Defeat 10 enemies with a melee weapon. Wrecking Ball - Smash your opponent into something 20 times in the "Chicken Fight!" level
