Pong.. :-D
Breathless is pretty good though I only had the demo version on my A1200/030. Clickboom (
http://www.clickboom.com) does have good games. Their games typically recommend a graphics card.
RTS/strategy games would be Earth 2140, Colonization, Foundation.
Quake II is available, too; however, don't know how well it would run without a graphics card.
Edit: You can also try some of the Amiga Classix CDs if you have a CD-ROM drive.
