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