Here is the full list of all 22 Zeno Clash achievements.
Input the Malstrum's Mansion secret code.
Complete Tower Challenge Number -3.
Complete Tower Challenge Number -2.
Complete Tower Challenge Number -1.
Complete Tower Challenge Number 5.
Defeat a heavy enemy without getting hit.
Beat the game without using weapons unless it is absolutely necessary.
Bring the Hunter down to 1 healthpoint in melee combat.
Annoy the man behind the door.
Complete Tower Challenge Number 4.
Complete Tower Challenge Number 3.
Complete Tower Challenge Number 2.
Kill 50% of the harmless animals in the game.
Find the secret easter egg.
Throw an enemy into another.
Complete Tower Challenge Number 1.
Complete the game.
Land 50 deflect kicks.
Shoot 21 Mucalosaurus Worshippers from the boat.
Ignite all pyres.
Capture 30 fireballs with the torch.
Learn all advanced combat techniques.