Little Dipper

You earned 10 stars in Challenge mode

Scorched Earth

You burned the Amish pot fields

Help From My Friends

You used the collectible special inventory items 25 times in Story Mode

IEDead

You've killed 60 enemies with grenades/explosives

No Place Like Home

You completed the "No Place Like Home" level

Chicken Fight!

You completed the "Chicken Fight!" level

Wrecking Ball

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

Chickens In Space

You completed the "Chickens In Space" level

Stewie-nator

You killed 500 enemies using Stewie

Santa's Sweatshop

You completed the "Santa's Sweatshop" level

Penny Pincher

You've successfully collected $50,000

Employee of the Month

You've successfully killed Vernon

Long John Peter

You completed the "Long John Peter" level

Justified

You killed 500 enemies using Brian

No Cheese, Please

You completed the "No Cheese, Please" level

Pussy Whipped

You completed the "Pussy Whipped" level

Handicapable

You completed the "Handicapable" level

Boom Headshot

You've killed 75 enemies with headshots

Something's Amish

You completed the "Something's Amish" level

It's All Greek To Me

You completed the "It's All Greek To Me" level

Multi-kill with a grenade

You successfully performed a multi-kill with a grenade

We Be Clubbing

You defeated 10 enemies with a melee weapon

Multi-Kill

You successfully performed a multi-kill with a melee weapon

Bipolar

You've switched between Brian and Stewie 10 times

Head Shot

You got your first head shot

One Shot Kills

You've killed an enemy with one shot

Day Labor

You've destroyed all of the piñatas