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 Day Labor (15 points) - Destroy all of the piñatas in the "It's All Greek to Me" level. Employee of the Month (20 points) - Kill Vernon. Pervert (10 points) - Hang around the room with Quagmire in a baby costume for 30 seconds. Wrecking Ball (20 points) - Smash your opponent into something 20 times in the "Chicken Fight!" level. Bunch of Chumps (15 points) - Survive 15 waves in Multiverse Madness. Cartoon Apocalypse (30 points) - Survive 30 waves in Multiverse Madness. Ugly Tastes Terrible (5 points) - Play poorly during the final showdown. Bird is the Word (10 points) - Taunt 5 times in a row with Peter. Big Dipper (40 points) - Earn 21 stars in Challenge mode. Little Dipper (15 points) - Earn 10 stars in Challenge mode. Teabag a D-Bag (5 points) - Taunt a dead opponent with Quagmire in Multiplayer. Grease Can't Save You Now (20 points) - Win a Capture the "Greased-Up Deaf Guy" match. Justified (40 points) - Kill 500 enemies using Brian. Stewie-nator (40 points) - Kill 500 enemies using Stewie. Bestest Infiltrator (20 points) - Win an Infiltration map. Mort Will Now Lend You Credit (30 points) - Buy everything available in the Store. There is no Cake (100 points) - Unlock all other Achievements. Head Shot (5 points) - You got your first head shot. One Shot Kills (5 points) - You've killed an enemy with one shot. Multi-Kill (15 points) - You successfully performed a multi-kill with a melee weapon. Multi-kill with a grenade (15 points) - You successfully performed a multi-kill with a grenade. First Kill (10 points) - You completed your first kill of a member of the opposing team in Multiplayer. Roadhouse (15 points) - You've meleed 3 members of the opposing team in Multiplayer. It's All Greek To Me (20 points) - You completed the "It's All Greek To Me" level. Something's Amish (20 points) - You completed the "Something's Amish" level. Handicapable (20 points) - You completed the "Handicapable" level. Pussy Whipped (20 points) - You completed the "Pussy Whipped" level. No Cheese, Please (20 points) - You completed the "No Cheese, Please" level. Long John Peter (20 points) - You completed the "Long John Peter" level. Santa's Sweatshop (20 points) - You completed the "Santa's Sweatshop" level. Chickens In Space (20 points) - You completed the "Chickens In Space" level. Chicken Fight! (20 points) - You completed the "Chicken Fight!" level. No Place Like Home (50 points) - You completed the "No Place Like Home" level. Obsessed (50 points) - You've completed all secondary objectives. We Be Clubbing (15 points) - You defeated 10 enemies with a melee weapon. Lockdown (20 points) - You've shut out the other team from scoring in Capture the Greased-Up Deaf Guy. Penny Pincher (40 points) - You've successfully collected $50,000. Mr. Unpopular (5 points) - You selected Meg as a character for a Multiplayer Match. The Cleaner (30 points) - You got a 10 kill streak in Deathmatch. Teabaggin' (15 points) - You've successfully completed a taunt 25 times. IEDead (15 points) - You've killed 60 enemies with grenades/explosives. Help From My Friends (15 points) - You used the collectible special inventory items 25 times in Story Mode. Boom Headshot (15 points) - You've killed 75 enemies with headshots. Bipolar (10 points) - You've switched between Brian and Stewie 10 times. Shut Up Meg (5 points) - You killed Meg during a Multiplayer Match. Scorched Earth (10 points) - You burned the Amish pot fields. How Do I Jump? (5 points) - You killed yourself with a grenade or satchel charge. Kings of Quahog (20 points) - You have won a Deathmatch mode (free-for-all or as a team).