I remember playing the very first Civilization on my Amiga 500 and staying up for 72 hours straight because i didn't know how to save games... Good times. Favourite retro games hmm... Some of you mentioned Red Alert 1 which i love. Same goes for RES1+2 (currently going through 5, not quite the same). But i think the first game that stands out to me, is Planescape Torment. It's not quite retro, but seing as some of you mentioned newer games i think it fits. That game to me, still stands out as having the best background story and most interesting universe for a RPG. If you wanna go further back - i kinda miss my old Double Dragon 2, for the original Gameboy :(