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