Darksiders, I think?

I always play Diablo 2 (mostly modded). besisdes that, League of legends and CS:GO are always part of my gaming life.

Funny you mentioned Heroes 2. Some time ago I was playing Heroes 3 with a friend of mine. Gosh, we love that game...! It could be the oldest game I've played this year. I'm not sure... Sometimes I do bring out old games to play just for fun. I can't recall what games I may have played that would be older than Heroes 3.

Pong (1972). Seriously.

Resident Evil 4...2005 I think.

I played the 3DS port of Dragon Quest VIII as well...not sure if that counts.

Rogue Galaxy. The 2nd oldest is .hack//G.U. Play both games people.

Probably star wars: the force unleashed on backwards compatibility. It came out in 2007? Something like that.

I prefer Heroes 2 over 3 because of visual style, but I have probably spent more time playing 3 anyway.

HOMM3 is great. I rediscovered it recently and it has a ton of fan-made content, new campaigns and new fractions. That's pretty great. You basically can play it endless.

System Shock 2 (1999). Back then my 1997 PC was too slow, later, having missed special offers and classic editions when I used Win 2000, that could run almost anything, my successive HW+Win XP configuration had too many compatibility problems, Win 7+new HW solved most of them, so when GOG gave SS2 away to anybody registering and installing its Galaxy utility, I finally caught the opportunity.