Here is the full list of all 17 Super Mutant Alien Assault achievements.
Unlock all equipment.
Use your pulse belt on a cooking explosive.
Kill 6 enemies with one sniper bullet.
Defeat a boss in under 10 seconds.
Beat the game in one run on normal difficulty, by yourself.
Beat the game in one run on normal difficulty, with a partner.
Kill the galaxy 3 boss.
Keep a booooomerang in the air for 30 seconds.
Make a gas ball travel at high speed.
Activate 30 pressure machines with explosives.
Kill the galaxy 2 boss.
Kill the galaxy 1 boss.
Wipe out an entire monarch flock with one sniper bullet.
Beat the game in one run on heroic difficulty, by yourself.
Beat the game in one run on epic difficulty, by yourself
Beat the game in one run on heroic difficulty, with a partner.
Beat the game in one run on epic difficulty, with a partner.