This is a personal list of PC video games I've known, tried, and at best enjoyed in my years; however, take notes that these are games still being available on the likes of Steam and GOG, which means titles like, say, The Chronicles of Riddick: Escape from Butcher Bay+Assault on Dark Athena won't be included due to unfortunate reasons like licensing issues and staying stuck as unstable abandonware. Hope you enjoy regardless.
Oh, and bear in mind that expansion packs aren't included for practicality reasons; if you want to pick Company of Heroes: Ardennes Assault, then vanilla, somewhat inferior CoH 2 will have to do.