WinUAE will also find rom, if you have correct one. (for example cloanto's roms)
What game you'll play?
I would suggest Lionheart, which is free, as developer released it for free.
http://www.cus.org.uk/~alexh/games/l...lionheart.html
(download link is on the third page)
http://Thalion.amiga.tm