Some of us still hold dearly to the games of the past, and one of them is Zork - one of the first interactive fiction games that dates back to 1977. Talofer99 on the Arduino forum also has the bug, and is in the process of recreating not only the game using an Arduino Mega - but has added support for a keyboard and display via the tvout library. Here is his work in progress:
Although this project may push the limits of the Arduino system, it is a testament to ingenuity and imagination. To get started with your own Zork or other creation - you will need more memory than what a standard Arduino board can offer. Therefore consider using the Freetronics EtherMega - the Mega2560-compatible with onboard Ethernet, microSD socket and optional PoE:
To follow the project, visit the Arduino forum page.