Apparently lucas arts used to make the dos games and they were quite good...
Full Throttle, The Dig, and Sam & Max Hit The Road are all classic DOS games from Lucas Arts. As for Star Wars, the original X-Wing and Tie Fighter games were also Lucas classics that were done on DOS.
The Wing Commander games were DOS based (I, II, III, and Privateer, not sure about IV & V). Great games in their time.
Doom, Doom II, Ultimate Doom, Dark Forces (another Star Wars game) and Quake were all DOS first-person shooters. I still like Duke Nukem 3D the most though. It was so much easier to customize and play with.
Sierra's Space Quest & Kings Quest series were really fun DOS games. Space Quest V has got to be one of my favorite games ever. Also, Sierra's Phantasmagoria and Gabriel Knight II were really good.
The 7th Guest (one of the first CD-ROM games) was a great puzzle game. The graphics were top-notch back in the day. Definitely worth checking out if you ever get the chance. There are files available to make it run in Windows XP, but it's a bit unstable so you have to save often or you end up losing your progress.
Crusader: No Remorse and Crusader: No Regret were great action games. I still can't get them to run properly in Windows XP (fail to start because of sound) and haven't got it to work properly with DOSBox either.
And finally, who didn't love Commander Keen?
