Kill 50 aliens
Kill 100 aliens
Kill 250 aliens
Foot stomp 12 aliens
Execute 20 aliens
Kill 10 aliens with Trip Mines
Kill 15 frozen aliens
Kill 15 aliens with the monster truck
Kill 6 aliens with the forklift
Kill 10 aliens with environmental explosives
Kill 10 aliens with tossed objects
Kill 15 aliens with melee attacks while on steroids
Eat 10 pieces of food during the SP campaign
Kill 30 aliens with headshots
Drink beer while on steroids or vice-versa in SP
Kill 3 aliens at once
Get knocked down 10 times
Find and steal a piece of poo
Get hit by 10 Pregnator bombs
Shoot down 20 alien fighters
Look at every page of a calendar in SP
Put a Trip Mine on a live alien
Blow up 5 enemy gunships or dropships
Win air hockey with a score of 7-0 in the strip club
Earn a 1,000,000 pinball score in SP
Drink a beer in SP
Take steroids in SP
Use a Holoduke in SP
Doodle something on the whiteboard in SP
Discover all ego cap rewards
Carry the gold pistol through the whole SP campaign
Complete the SP campaign on Easy Difficulty
Complete the SP campaign on Normal Difficulty
Complete the SP campaign on Hard Difficulty
Complete the SP campaign on Insane Difficulty
Watch the credits all the way through
Find all 3 helmets in the SP campaign
Listen to all phone messages
Drink all of the beers in the strip club
Kill all of the catfish in the underwater level
Shoot down the blimp above the stadium
Knock out the talent at the talk show
Win a game of Alien Abortion in the strip club
Unlock the secret closet at the end of the Forkstop
Defeat the Cycloid
Defeat the Battlelord in Las Vegas
Defeat the Alien Queen
Defeat the Battlelord on the Hoover Dam
Defeat the Octaking
Defeat the Energy Leech
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