I played unreal and unreal 2 about a week ago. Still lots of fun.
 

Zuhl3156
I just installed Crysis again just for kicks. It's still a fun game.

Awesome. I play it also and have a pretty good compilation of mods, textures, and Reshade going on. Took me a while to get all several mods working at once, but still needs a bit of tweaking on the sweet fx preset.   

I've been playing BF2 with the Forgotten Hope 2 mod recently. It's a very well done WWII mod, detailed weapons and maps, Hurtgen Forest is my favorite one. 
 
Getting the itch to start playing some MW4 Mercs as well, I just have to get around to installing the performance patch because it currently runs at a locked 26 FPS which is no fun.

I still play Civilization 3 and Master of Orion 1&2.

I still play Day of Defeat fairly often. The original, before the source engine. Mostly bots in the servers but there are a couple servers that still have real players.

Popped in the old original Warcraft 3 CD recently

Have used a few emulators for N64.  Old school Mario is the best.

I put arcanum in the other day about a week ago. While it did "play", there was fixes that had to be applied which were easily able to be found via Google. Was fun for a while. It's not as fun as neverwinter nights though

Went to a local retro game store and bought 10 games for around $40.
Found the original Homeworld (it may be a European copy because it has a PEGI rating instead of the ESRB).
 
It plays on Windows 7 with no issues and no compatibility mode needed. It is recommended to patch the game to 1.05.
 
Here is a link if somebody is looking for a patch. http://www.sierrahelp.com/Patches-Updates/Patches-Updates-Games/HomeworldSeriesUpdates.html
 
 
I also bought Delta Force 1, Delta Force 2 and Delta Force Land Warrior from Novalogic, Stalker: Shadow of Chernobyl, FEAR 2, Half Life 2, Rainbow Six: Rogue Spear (and the mission pack Urban Operations), Rainbow Six: Covert Ops Essentials and Tom Clancy's Ghost Recon.
The PC games are $3.95 but they had a buy 2 get 1 free sale :D

Hacking and slashing my way through Diablo II the other night.
 
Plus I have games like Baldurs Gate I & II, Crusader: No Remorse & No Regret, Fallout 1 & 2 + Tactics, Freelancer, Freespace, Icewind Dale, Jade Empire, Jagged Alliance, Mechwarrior, Mechcommander, Neverwinter Nights, Rollercoaster Tycoon (all of them), Sim City 4 and Wing Commander.  
 
Just to name a few.