SlashGear

Before there were graphics at all, there were interactive fiction games. They were text-based and required a certain syntax of text input to work.

Someone out there still likes the games enough to make a z-machine interpreter for the iPhone so you can play these types of games on your phone. After you Jailbreak it you can install the requisite software and play away.

The most up to date version is still in the decimals, .2 to be exact. But the latest version can play the games, and even save them so you can continue your late night adventuring.

Interactive fiction on the iPhone [via TUAW]