I had the opportunity to try out "castlevania" for DOS, which is CGA. Uses PC mono speaker (yeah, castlevania music on a mono PC speaker & sound effects, it starts to get real crazy and insanely fast beeping).
Although playing it in windows 98 is a bit of a job. It'll keep giving you a "cannot divide by zero" error, if you keep trying to load the game a few times it'll eventually go. It would be great to try out on the 5150 once I get some spare 5" low density disks... and DOS (not sure what version it needs though, obviously an older one).
Other cool CGA games would be commander keen (haven't really tried them out before, but I do know about dopefish). I'm a big fan of Tom Hall games... it's too bad he left id software, I'm sure doom would have been a lot better. Tom recently had a stroke, so, hope he's recovering nicely! My best wishes to him.
And of course Ultima, can't go wrong with a good Richard Garriott game, but I've only had a chance to play a little bit of those: and it was mostly the newer ones. Ultima Ascension was included with the Voodoo 3 driver CD if I'm not mistaken.
In all honesty, I like VGA better than CGA (yeah yeah graphics don't make a good game, but they can make a good one better); by the time I started playing games, things like Age of Empires 1 came out. Besides, the Amiga 500 had way superior graphics (like James Sachs' artwork for Defender of the Crown), PCs were still in the dark ages: but when they caught up, the sudden advancement rendered the Amiga 500 back into obscurity. Kind of like how 3Dfx was ahead in Graphics technology, but soon as the other companies caught up, the race was over and they became bankrupt. One of my theories for Commodore losing money however was Jack Tramiel's leave, you get stupid CEOs in companies and then management ultimately transcends into bankruptcy. One example of comparison is comparing Louis V. Gerstner jr. who kept the IBM divisions together in order to revive the company -- then comes along highschool dropout Samuel Palmisano who goes and sells a whole bunch of IBM's divisions (PC & printing) just for a quick buck into his own pocket! I hope Sammy is enjoying that one billion he got from Lenovo.
Here's Richard taking his space tour (yeah, thumbs up to Ultima):