Hey guys, I can't seem to figure out how to turn game mode on when I'm on an HDMI input. Is it possible?
What causes the game mode option to be greyed out such that it can't be changed?

I would think that Sony with its PS3 would allow for game mode on HDMI...what gives?

What resolution are you sending to the A2000 from the PS3 over HDMI?
Game mode reduces the response time of your TV but reducing the complexity of itsupscaling and deinterlacing algorithims. So if you are sending it 1080p there is no futher benefit to being in game mode.

Gamemode is only for 480i and 1080i inputs. If your PS3 is outputting 1080p/720p/480p then no gamemode is needed (or available).