Civilization being missing is definitely a travesty. I think if the editor went back they'd realize that was a mistake.

Personally, I'd put Planescape: Torment on there, but I know it's a bit of a niche game.

I think Monkey Island deserves to be on too, as a representative of the adventure genre.

Not everyone liked it, but I'd put Heavy Rain on my list too.

Didn't realize that Heroes 3 wasn't on the list at all. Heroes 3 absolutely deserves to be on the list, it's still one of the most played old games and the top selling game on GOG I think.