Game: Zombie Ace

I'm comfortable saying that "endless runner" is a bonafide genre now. Canabalt was really the first one to break out; it hit the ground running (terrible pun review quota filled) and never looked back. While the setup is different from title to title, the point is always the same: travel as far as possible. There's no beating the game per se, just go as far as you can without failing. Zombie Ace has the same great trappings, but adds some much-needed complexity to the proceedings.