Welcome to my little guide for Magicka: Wizards of the Square Tablet in which i will tell you how you get every single achievement in the game.
This guide contains major spoilers for the game, so if you want to get surprised and not know everything which will happen in the game, you should not read this guide.

This achievement shouldn't be that hard to get. You just need 2 players (Player 2 will be the green wizard) and play any level without player 2 casting any spells or dying.
I recommend playing the first level since it is really easy to beat.
By the way, this achievement is a nice reference to this series of Youtube videos:

Not very hard: just cast the magick "Thunderbolt" on a Land Shark.
It's even more easy to do if you freeze the Land Shark when there are no other kind of enemies left

In order to get this achievement, you first have to beat the game at least once to get the magick "Oil Rain".
If you have this magick, cast it in the Beach level in the first world where the Seagals are.
They will slowly die after casting the magick.

Again, you have to be in Multiplayer mode to get this achievement.
The player who wants to get it has to pick the Contaminated Robe and the other one lowers his health by casting water on himself and using lightning.
If he is on low health, the player with the Contaminated Robe has to teleport directly into the other player who will explode if done correctly.

To inflict enough damage to yourself, go to hard mode wearing the Testosterone Robe.
Then join any level and freeze yourself by casting water and then cold on yourself.
After that cast 4 rocks on yourself and you will explode and rip into pieces.

Simple: Just kill a fellow wizard by using any spells or magicks.

There are two ways to get this achievement:
1st: Go to Thor's Workshop (last level of the 3rd world) and get decaptivated by the giant saw
2nd: Get killed by one of these digging monsters who bite your head off and can be found in the last world

You just need to cast a shield containing 3 more different elements, for example rock+fire+life+shield

Go to the first level on normal mode and spam rock+fire+fire+fire or lighning+lightning+fire+fire.
Make sure to cast a fire shield on you since you are not allowed to heal you and there are Bomber Goblins who can burn you

You have to cast the Magick "Supernova" which you should have in The Book of Knowledge and Magicks from the beginning.
The element combination is: Lightning+Life+Shield+Fire

Just go to the first level on normal mode again and kill every enemy with Life+Lightning+Lightning+Lightning which make them explode.
Watch out for the Bomber Goblins since they will burn all enemies next to them when they die which can make them die from the burning and not your beam.

Since you have to die at least twice as often as all your teammates combined in one stage, I recommend playing with only 1 more player which should be a friend to make sure the player does not ragequit.

There are many ways to get these 3 achievements but the most easy way is to face the final boss on hard mode.
She is able to hit you with an attack which deals 9999 if you're not wearing any special robe or staff

Go to multiplayer mode and damage yourself by spousing you with water and using lightning.
Since you should still be wet, selfcasting cold will freeze you instantly and the other player has to shoot a fully charged salve of 4 rocks while you are still frozen.

Easy: Go to the first level on normal mode and shoot a Life+Lightning+Lightning+Lightning beam at the Goblins.

Just go to the shop and purchase a pet.
If you really don't want to spend much money on a pet, buy a fairy which only costs 300 crones.

Since everyone in the party has to be death at once, I recommend to play with friends because other players could ragequit while trying to kill everyone.
If you don't have enough people to play with you, you should use the Arcane element to quickly kill the other players and then kill yourself.

To get this achievement you need the Deathverge Staff you get for beating the game.
It has a 25% chance of casting "Explosion" every 4 seconds, so damage yourself to low health and go to the impact's orange circle as soon as it appears.

Just do exactly the same someone else did to you in "Extra style bonus" to another wizard.

In certain levels you can find traps on the ground like thorn pits or elemental traps.
Just step on one of them and wait until you die.

Play online with 3 other people (player 4 will be the yellow wizard) and let him die first in the very first encounter of the level. It does not matter who kills the yellow wizard, he can even commit suicide as soon as you can see the red dots at the side warning about incoming enemies.

Deafeat the first boss of the game. This shouldn't be a very hard task to do if you wait until the Big Friendly Crab opens its shell and then shoot Life+Lightning+Lightning+Lightning at it.

The easiest way to beat the Elk Dragon is to pick the Contaminated Robe and just stand directly under his head.
Don't forget to spam Life on yourself.

Defeating Disa is not easy but if you keep having elemental shields on you and heal you constantly, you have enough health to spam "Explosion" (Fire+Rock+Rock+Fire) which kills her (kind of) quickly.

This monster will appear in the second last level as a boss.
If you already got Arcane, keep spamming it. If not, use the magick you got for defeating Disa (Ice+Rock+Ice).
This should kill the Dark Young pretty fast.

To kill Helsdottir I recommend to keep moving so she does not hit you with her special magick and selfcasting either a cold or a fire shield on yourself.
To attack her you should fire Life+Lightning+Lightning+Lightning and she will be history soon.
If you manage to do so, you successfully beat the game.

Now the major Disappointment:
This achievement is gained totally random by beating any level.
It is said to appear more often if you play on normal mode but noone knows, if that is actually true...
So to put in Vlad's words: Good "Luck"

This achievement is quite tricky:
Your staff has to get stuck in the ground pole-first while you get blown into bits. I don't know if the ground whereon you do that has any influence on this but I managed to do so in the very first level by first freezing me and then selfcasting 4 rocks.

In order to beat Grampa the Gray, you first have to unlock the level where you can battle him.
First go to the first level of the final world and play it until you see a grey arrow made of stones on the ground pointing into the direction you came from.
This should be after the 3rd encounter with enemies, so make sure you kill all of them.
After that stand on the arrow and then go back to the beginning of the level without stopping.
Go arond there for about 10 seconds and a message appears telling you that you can fight Grampa the Grey.
Just finish the level to unlock "The river at midnight" where Grampa already waits for you.

This battle is really though, even on normal mode so don't forget to constantly heal you and cast a shield on you.
I recommend using the Contaminated Robe and spamming Ice+Rock+Ice (Disa's magick) when he teleports to you and to not stand in the middle since he will summon a powerful ice attack there.
If you manage to bet Grampa the Grey he will reward you with the Bearded Robe and the powerful Arcane element, which works as a magick resulting it to not be a beam like in the original Magicka

If you finally managed to get every single achievement in this game, I want to congratulate you for a new perfect game!