What a blast from the past. I just got done downloading and installing Wolfenstein via Cydia on my cracked iphone and was VERY impressed. I was interested because unlike Quake or other FPS games released on the phone Wolf3D was originally designed with a lack of look up/down controls. This makes the game MUCH easier to control because of the simplicity of only needing to turn left and right.

Tip: App store users pay $4.99 but via Cydia it's free b/c of open source and John Carmack's kind hearted nature.