Full list of all 12 Mutant Storm Empire achievements worth 200 gamerscore.
Achievements they've won
Achievements they've not won
Complete all 16 levels on Black Belt in Single Player.
Both players get a million points each in Multiplayer.
Both players get their multiplier to x10 in Multiplayer.
Get all the Beastie Combos by shooting a certain amount of each of the special beasties.
Complete World 4 on any difficulty.
Complete World 3 on any difficulty.
Complete World 2 on any difficulty.
Get the multiplier to x10 in Single Player.
Complete World 1 on any difficulty.
Complete Level 1 on any difficulty.
Get the multiplier to x2 in Single Player.
Get a Beastie Combo by shooting a certain amount of only 1 type of beastie.