ACHIEVEMENT - HOW TO UNLOCK Dominate at Fatherhood - Beat a mission wearing the baby carrier! Get Over It - Revive other players 8 times! Greetings, Earth Citizens - Beat a mission wearing the astronaut helmet and backpack! Happy 50th, Walter - Reach level 50! Lookie, Many Stars - Get 75 stars! Lower Carbon Footprints - Destroy a robot overlord in multiplayer! Make Many Friends - Play co-op! Number One Tugnut - Come in 1st in a four-player mission! Punch Many Bullets - Punch two bullets, killing two robots, with one melee swing! Shoot Many Robots - Kill 10,000 robots! Shoot Some Robots - Kill 100 robots! Slotally Tober Saughter - Complete a mission on hard or insane without dying or drinking a beer!