I missed out on a lot of PC darlings like Starcraft, Warcraft, Diablo, Planescape Torment, Grim Fandango, Fallout 2, Baldur's Gate II, Half Life 2, KotOR, and the Deus Ex franchise though I do actually own a few of these.

In console gaming, I've never really delved into GTA series and most Rockstar Studio titles in general. For more modern "classics" I have yet to really play Uncharted (despite owning the first four entries) and the The Last of Us.