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