Just recently finishing playing System Shock 2 from start to finish with a friend in co-op, a game I've played but never finished in the past. Really great game, totally wonky in places but the amount of environmental story telling and details they put in are astounding. Surprisingly the multiplayer didn't break too much till right near the end.
I'm also replaying the first Discworld game which is always a hoot and a little Grim Fandango Remastered here and there. I've also recently got the first Splinter Cell game all setup and working (EAX HD, updated textures, vids and projection shadows) on my XP machine so looking forward to experience that in full. Are there any games in the Splinter Cell series on pc that are not worth playing? As I was thinking to just play them all in order.