I know it's not a game (sadly) but we recently received a donation at the Personal Computer Museum of a Tymac cartridge called "Prowriter". I haven't plugged it in yet to see what it is all about (assume it's a word processor) but has anyone ever seen this before?
http://pcmuseum.ca/details.asp?id=39095&type=Software
Let me know. I couldn't find a ROM of it - may be time for us to make one!