Just Get Through [Steam store page]
If you mash together the responsiveness of Super Meat Boy, and the randomness of Spelunky, you get a simple but satisfying randomized platformer.

APB Reloaded [Steam store page]
Third-person shooter MMO with odd aiming and repetitive missions. The teams are often completely unbalanced and the mission goals sometimes are as well. Turtling many times wins the match.

A decent puzzle flying platformer - the pod has no propulsion so you must use cannons, bouncing, etc to navigate the map. The controls do take a bit of getting used to - especially when bouncing - that's my only complaint