Kill an enemy with a single shot to the head
Successfully kill an enemy with one shot
Unlock all other Achievements found in the game
Perform a multi-kill with a melee weapon
Perform a multi-kill with a grenade
Successfully complete your first kill of an opposing team member in Multiplayer
Kill 3 members of the opposing team with a melee attack before you die in Multiplayer
Complete the "It's All Greek To Me" level
Complete the "Something's Amish" level
Complete the "Handicapable" level
Complete the "Pussy Whipped" level
Complete the "No Cheese, Please" level
Complete the "Long John Peter" level
Complete the "Santa's Sweatshop" level
Complete the "Chickens In Space" level
Complete the "Chicken Fight!" level
Complete the "No Place Like Home" level
Complete all secondary objectives
Defeat 10 enemies with a melee weapon
Shut out the other team from scoring in Capture the Greased-Up Deaf Guy
Collect $50,000 in Story Mode
Choose Meg for a Multiplayer match
Get a 10 kill streak in Deathmatch
Taunt 25 times in any Multiplayer match
Kill 60 enemies with grenades/explosives
Acquire any collectible special inventory items and use it 25 times in Story Mode
Kill 75 enemies with headshots
Switch between Brian and Stewie 10 times in Story Mode
Kill Meg during any Multiplayer Match
Burn the pot fields in the "Something's Amish" level
Kill yourself with a grenade or satchel charge
Win a Deathmatch mode (free-for-all or as a team)
Buy everything available in the Store
Win an Infiltration map
Kill 500 enemies using Stewie
Kill 500 enemies using Brian
Win a Capture the "Greased-Up Deaf Guy" match
Taunt a dead opponent with Quagmire in Multiplayer
Earn 10 stars in Challenge mode
Earn 21 stars in Challenge mode
Taunt 5 times in a row with Peter
Play poorly during the final showdown
Survive 30 waves in Multiverse Madness
Survive 15 waves in Multiverse Madness
Smash your opponent into something 20 times in the "Chicken Fight!" level
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
