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