Complete each achievement to get the allotted gamerscore. The numbers between the () is the points given for each achievement.
Shoot Many Robots (30) - Kill 10000 robots!
Shoot Some Robots (10) - Kill 100 robots!
Happy 50th, Walter (20) - Reach level 50!
Greetings, Earth Citizens (15) - Beat a mission wearing the astronaut helmet and backpack!
Lookie, Many Stars (20) - Get 75 stars!
Dominate at Fatherhood (15) - Beat a mission wearing the baby carrier!
Slotally Tober Slaughter (15) - Complete a mission on hard or insane without dying or drinking a beer!
Punch Many Bullets (15) - Punch two bullets, killing two robots, with one melee swing!
Lower Carbon Footprints (20) - Destroy a robot overlord in multiplayer!
Get Over It (15) - Revive other players 8 times!
Make Many Friends (10) - Have someone you invite join you in an online game!
Number One Tugnut (15) - Come in 1st in a four player mission!