Ah yes, the good ol' games of Dos...
Top left: Chex Quest (I don't know if you've ever heard of it or not but it was only sold for a limited time in Chex cereal boxes a LONG time ago; good luck trying to find this game. It's basically a Doom remake)
Top right: Cosmo's Cosmic Adventure (a best-selling game of its time; made by Apogee)
Bottom left: Hocus Pocus (another best-seller of it's time; a very addictive game made in 1994)
Bottom right: Xargon (made by Epic MegaGames)
And all these games can still be played today... with DosBox! ^__^
(These aren't my only old DOS games; I have quite a few others, such as Descent 1 and 2, Jetpack, Skyroads, Commander Keen, and the list pretty much stops right there; yet I am looking for more "old games" as I speak!)