Here is the full list of all 31 The Nom achievements.
Obtain three prizes of the same type in Chest Room
Beat level 10
Defeat boss enemy
Obtain 25m in bonus level.
Obtain 50m in bonus level.
Obtain 75m in bonus level.
Unlock all attacks
Beat Stealth Mode at least once
Beat level defeating all enemies without using decimate attack
Obtain 15 gold by defeating enemies with throw attack in single level
Obtain 10 diamonds by defeating enemies with electrocute attack in single level
Beat level 50
Beat level 100
Unlock the "Helper" in your base.
Unlock the "Generator" in your base
Unlock the "Rocket" in your base
Obtain 3 keys in 3 consecutive levels (not counting Push Bonus Level or Stealth Levels)
Take two or more enemies with one bomb attack
Hide and decimate nearby enemy after getting him close to you
Throw 5 enemies
Obtain most of your fury and go to fever mode within one level
Change skin
Morph into objects atleast 5 times
Pick all coins within one level
Finish any level within 30 seconds. (not counting Push Bonus Level or Stealth Levels)
Finish level without killing any oponents within level
Finish level with critically low health
Defeat 15 enemies in fury mode
Gain maximal size
Alarm atleast one enemy by standing on camera
Defeat 3 enemies with three different attacks within one level