This thread brings back a lot of memories, so many games I remember with fond memories. Ultima series, X-Com, Civilization, Pirates!, Dune, X-wing, Eye of the beholder, Quest for glory, all the Sierra "quest" games, just about every single Lucasart adventure etc etc etc...
Not counting any earlier machines, my first "IBM compatible PC" game purchase(s): Sim City and Populous. Sim City came with a dark maroon copy protection symbol sheet, and it was difficult as heck to actually figure out the symbols. Entering it wrong resulted in Sim City going all disaster crazy and being unplayable, which happened more than once, sometimes without me actually realizing I had typed it in wrong until the game became completely utterly so full of disasters it was impossible to keep playing. Copy protection "fun"...
*tsks*
The only "IBM compatible PC" game beside Elite 2 I bought that came on 720k floppies, and I should still have them somewhere along with the boxes. I highly doubt the they still work after so many years of storage though.
Can't quite remember when it was though, nor the price I paid.