One of the most fun open world games I've ever played. Grappling Hook + Parachute = Super Fun Traversal of a huge world. Also, lots of explosions.

If you like dual stick shooters and music, Beat Hazard is for you.

Super intense strategy gaming at its best. You program your squad of dudes and tell them how to go and take out the other squad of dudes. Cover, aiming direction, weapon type, movement speed, and more all are taken into account of whether you get that sweet, sweet kill shot. It's all pretty easy to figure out and there are a ton of game modes on top of a campaign, but tight core gameplay is what sells it all. A 15 second game can take an hour of planning. It's basically chess with guns, and it is awesome.