Trism is a game developed for the iPhone. More information can be viewed here .http://www.cnn.com/2008/TECH/11/18/iphone.game.developer/index.html
The game is currently around 4.99$ and is very fascinating. The game comes with 22 unlockable achievements and 4 different modes inluding infinism, treminism, syllogism, and the tutorials. There are a lot of levels in this game and are worth buying. This game has made over 250 000$ for Demiforce and is very popular right now.