I recently ported an old TI-83 BASIC RPG to the TI-83+. Altough BASIC games should be cross compatible with both platform, due to memory restrictions on the 83+/SE/84+ models (RAM) I had to use an ASM program to load some programs that are now stored into the archive memory during gameplay.
Dazel 4: The Mastoc Quest is a large RPG with lot of cool animations and a nice storyline. 3 characters per battle, sprites and 15 hours of gameplay. A must download if you understand a bit of french language. The game is now avaliable in the archives.