What about a 2d mmo?
I tried Guild Wars 2 in 3D. It was pretty good, but honestly nothing to write home about IMHO. For some reason gaming in 3D bugs my eyes much moreso than 3D movies. I have a DLP projector with active shutter glasses and the 3D is phenomenal (zero ghosting), but I think the active glasses may hamper 3D gaming in terms of potential headaches, especially if you're having really long sessions (Raids in WoW, for example).
Video: Optoma HD3300, Panamorph UH480, Darbee Darblet, Samsung BD D6700 Blu Ray player, DIY Seymour Centerstage XD 138" Curved Screen
LCR - Tannoy DC12i, Sides - Tannoy IW63, Rears - Tannoy Saturn DC6ti Bookshelf, Ceilings - Tannoy CMS 603DC (TF), Tannoy CMS 601DC (TR), 3 Micro Marty/1 Full Marty DIY subs
Amplification: Emotiva XPA-3, Emotiva XPA-2, Outlaw Audio 7700, 2x Inuke 6000DSP
Receiver: Anthem MRX 720