Cheat Mode...
	Various Steam Achievements...

Select "Options" at the main menu. Select "Cheat", then enter one of the following codes to activate the corresponding cheat function. Note: Enabling codes will disable game saves. that you will be unable to save upon activation.

Effect	Code
All characters in multiplayer mode	CAST
All costumes	WRDB
All weapons in multi-player mode	DKSD
All weapons in single player mode	GTSM
Level select	RMTE
Maximum money	PWTR
One shot kills	MNKY
Unlimited ammunition	GGTY

Complete the indicated task to unlock the achievement.

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.