My brother and I discovered this on the Amiga on *floppy disk* .. it was a flakey copy, which didn't install to hard-drive correctly, so saving games didn't work. End result was many marathon sessions over the weekend, leaving the machine on overnights. It was so so much fun. ..after a while I bought a legit copy, and many many more weekends were absorbed for years to come.
Now Open XCom, combined with my Steam purchase, and the amazing Amiga music set from Fenyő's sound page make this better than I ever could have imagined. The Amiga version didn't have darkness, nor animation, on the battlescape. (Man darkness is a pain)
Today I completed the game for the first time. Amazing stuff. I can't thank you guys enough for creating this. ..now I'm going to tweak the options and dive back in. {manic grin}