Destroy all of the fuel in the fuel depot.
Defeat 25 enemies with the bazooka.
Defeat 25 enemies with the grenade launcher.
Beat the game, save the world.
Finish any level in less than 20 seconds.
Discover a hidden room.
Finish a level without killing any enemies.
Answer 20 trivia questions correctly.
Defeat 25 enemies with the Uzi.
Kill 20 or more enemies on any level.
Defeat 25 enemies with the minigun.
Answer 10 trivia questions correctly.
Defeat 25 enemies with Gorbachev's blowgun.
Defeat 25 enemies with the assault rifle.
Defeat 25 enemies with the shotgun.
Defeat 25 enemies with the hand gun.
Defeat 25 enemies with the silencer pistol.
Answer 3 trivia questions correctly.
Defeat 25 enemies with Reagan's katana.
Complete a level without setting off any alarms.
Complete a level.