Don't remember the specs on mine, but Jazz Jackrabbit, some kind of math and reading game that looked like a platformer. Then I had one with Heretic, Doom / Doom II, and Rise of the Triads
8088XT in 1988 or so. Defender Of The Crown in glorious four colour CGA.
That's a name I haven't heard in a very long time, and now I'm going to watch a play-through on YouTube.I don't remember the PC but I remember playing the shit out of the Dr. Brain games.
My first own PC was a Packard BELL 33MHz SX that looked almost like the one in your picture. It had a Sound Blaster and a CD-ROM drive that came with Mega Race (an FMV OutRun style racing game with a shitty future TV Host). First CD-ROM game I bought was Rebel Assault 1 (no idea why I didn't get 2, maybe it was out in Germany only a year later?!??). Favorite games I played on it were UFO - Enemy Unknown, Sim City 2000 and Jagged Alliance 1 (JA2 later became my favorite game of all time for most of my life).Some of the early games were SimFarm, Microsoft Flight Simulator (5.0 DOS), Star Wars Rebel Assault II, SimCity 2000 (Windows 3.x).