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