adventure_of_link wrote:
I think Number Munchers was also DOS, not sure. and wasn't there some crappy Mario game for DOS? I vaguely remember playing that in class as well

Yup, Number Munchers was DOS and the game you are thinking of was "Mario is Missing"
Some favorites for me were the LucasArts games, namely Maniac Mansion, Zak McKracken and The Alien Mindbenders and my personal favorites -- The Secret of Monkey Island (1 and 2).