Are you still playing Magicka, or at least looking for a reason to return? Arrowhead Game Studio's creative action title lets you mix and match magic types to produce everything from electric beam attacks to shield walls to storm clouds. If you haven't tried it yet, you really should, it's addictive and has a great sense of humor.
Since launch earlier this year, Arrowhead has released a huge amount of additional content for the game, and it seems like the next addition, called The Stars are Left, will be the biggest yet. Themed after horror writer H.P. Lovecraft's Cthulhu Mythos, when the content is ready this winter, it'll include new robes, bosses, two challenge maps, magic types, enemies and more, and most importantly a new co-op adventure campaign, said to be "several levels long."
It seems like publisher Paradox and Arrowhead aren't going to be especially strict about how you access The Stars are Left, because as long as the host player of a co-op match has purchased the content, everyone else can jump in and play(Mythos Gold). Sounds like a pretty good deal.