Here is the full list of all 31 Magicka: Wizards of the Square Tablet achievements.
Defeat Helsdottir.
Defeat the Dark Young.
Defeat Disa.
Suffer at least 500 damage in one blow.
Suffer at least 1000 damage in one blow.
Kill a Land Shark with a Thunder bolt.
Defeat the Elk Dragon.
Defeat the Big Friendly Crab.
Win a stage without ever using the Life element.
Purchase a familiar.
Unlock this achievement to unlock this achievement.
Multiplayer: Have the green wizard never die or cast a single spell and still win the stage.
Let a Seagal die from Oil.
Multiplayer: Telefrag a fellow wizard.
Blow yourself up with a regular self-targeted spell.
Multiplayer: Kill a fellow wizard.
Get decapitated.
Imbue a personal barrier with three different elements.
Cast Supernova.
Win a stage by blowing every single enemy to bits.
Multiplayer: Die at least twice as often as all your teammates combined.
Suffer at least 5000 damage in one blow.
Explode so hard that your staff makes 3 full rotations before landing.
Gib three enemies in one second.
Multiplayer: Have a team of four wizards all die.
Get killed by your own staff.
Multiplayer: Deal at least 800 damage to a fellow wizard in one attack.
Die from a stage hazard.
Multiplayer: Have the yellow wizard die first in a stage's very first encounter.
Get blown to bits and have your staff get stuck in the ground pole-first.
Defeat Grampa the Gray.