This is a cool game and a bargain

http://store.steampowered.com/sub/8556/

Great coop (single screen) game with control pad on your media PC.

Basic gist is you are a magician with 8x skills. You can mix the skills and cast them in different ways (on friend, on enemy, around you in a circle or forward in a beam). You can cast each of the 8x skills in sequences of 5x which makes the number of combinations pretty crazy. Even as I was finishing the first game I was still working out new spells which I hadn't used yet.

Agree, my computer isn't a slouch and it really slowed down for extended periods for no reason quite often.