Surfing the Net I found the website of a guy who's creating a retro-looking RPG, in Ultima stile. He's writing the game in pure assembly for the TI-99/4a
Here it is his website: http://www.adamantyr.com/crpg/
He also had posted a list of games he used for inspiration
... well, there are some well-known classics like Ultima or Final Fantasy (the first, for NES), but there're many games I never heard before like Gates of Delirium, Dungeons of Daggorath (both for TRS-80
!) and Legends 1&2 (by SSI) for TI-99/4a!!
Here's some screenshot of Realms of Antiquity, his "old looking" game...