I have taken Thy Dungeonman from homestarrunner.com and turned it into a TI calculator program! Unfortunately, I am not releasing the source code for this program just yet. However, it is available as a .8xp download. I have only tested this program on a TI-84+, but it should work on other models.
Download this program here: http://rapidshare.com/files/402159572/DUNGEON1.8XP.
Install the program using the TI Send To Device utility included in the TI Connect program (C:\Program Files\TI Education\TI Connect\TISendTo.exe).
The opening screen of this program contains the credits, which I shamelessly ask you to leave in place.
This program was made by Abcorn.
The original Thy Dungeonman is located here: goo.gl/TB96.