Congratulations! You made Magicka and have finished creating odd DLC content for the friendly fire(ball) simulation. What do you do next?
1) Go hiking in the Pyrenees.
2) Why not craft some sort of single player Magicka RPG?
3) Form a band sort of like Daft Punk but with all the sci-fi robot vibes replaced by wizard's robes and jokes about willies.
4) Create a fast-paced multiplayer homage to eighties action movies, of course.
If you picked four, you are probably Arrowhead and you have made The Showdown Effect