Rolled IBM PC, but as my 2nd gen computer pick. Obviously it didn't get much yet outside of ports and simple homebrew. Think things like Maxit, a 15 puzzle with numbers instead of a picture or a single button auto-moving fixed screen shooter.

I did get to play a Sierra Hi-res adventure, but in CGA (I forgot about the composite mode). Another interesting one was Galaxy, a 1-20 player strategy game, but it was too simple and large battles just take way too long.

Picrel is Voyager 1: Sabotage of the Robot Ship. It's one of those proto-FPS games with dungeon crawler movement. It's "real-time", though your enemies don't actually move, just health recovery and the fight itself. Your goal is to either kill all the robots or destroy the generators and escape via shuttle You get a very useful map in the game, so you don't have to worry about that. Big problem with it is that moving reduces your HP and you then have to wait for it to refill which makes the game slow. There's no timer unless you destroy the generators, so it's just best practice to wait a while in front of a door.