Kill 75 enemies with headshots

Switch between Brian and Stewie 10 times in Story Mode

Kill Meg during any Multiplayer Match

Acquire any collectible special inventory items and use it 25 times in Story Mode

Kill 60 enemies with grenades/explosives

Choose Meg for a Multiplayer match

Get a 10 kill streak in Deathmatch

Kill an enemy with a single shot to the head

Kill yourself with a grenade or satchel charge

Win a Deathmatch mode (free-for-all or as a team)

Hang around the room with Quagmire in a baby costume for 30 seconds

Kill Vernon

Destroy all of the piñatas in the "It's All Greek to Me" level

Survive 15 waves in Multiverse Madness

Play poorly during the final showdown

Kill 500 enemies using Brian

Earn 10 stars in Challenge mode

Collect $50,000 in Story Mode

Taunt 25 times in any Multiplayer match

Perform a multi-kill with a melee weapon

Complete the "Something's Amish" level

Complete the "Handicapable" level

Perform a multi-kill with a grenade

Complete the "It's All Greek To Me" level

Kill 3 members of the opposing team with a melee attack before you die in Multiplayer

Successfully complete your first kill of an opposing team member in Multiplayer

Complete the "No Cheese, Please" level

Complete the "Pussy Whipped" level

Defeat 10 enemies with a melee weapon

Complete the "Chicken Fight!" level

Complete the "No Place Like Home" level

Complete the "Chickens In Space" level

Complete the "Santa's Sweatshop" level

Successfully kill an enemy with one shot

Complete the "Long John Peter" level

Unlock all other Achievements found in the game

Smash your opponent into something 20 times in the "Chicken Fight!" level

Taunt 5 times in a row with Peter

Survive 30 waves in Multiverse Madness

Win an Infiltration map

Buy everything available in the Store

Burn the pot fields in the "Something's Amish" level

Complete all secondary objectives

Shut out the other team from scoring in Capture the Greased-Up Deaf Guy

Kill 500 enemies using Stewie

Taunt a dead opponent with Quagmire in Multiplayer

Win a Capture the "Greased-Up Deaf Guy" match

Earn 21 stars in Challenge mode