I use my projector as my primary TV which includes games. I've been gaming on a projector of one type or another (CRT then DLP) since 2000. Once you get used to it you'll never want to use a TV again. I wouldn't say that it's harder to play competitive games like online FPS', though I prefer Halo to purely twitch games like CoD, but you have to keep your viewing angles reasonable. I'd say anything closer than 1.5 screen widths and you're going to have issues picking up the HUD elements at the screen edges. For games that don't have a HUD or where it's not critical that you be able to pick it up clearly in your peripheral vision you can sit closer to increase the immersion factor. I've logged hundreds, if not thousands, of hours playing games of all types on a projector (except sports games, I gave those up a long time ago) and it's never been a problem. As with any display you plan to game on, input lag has to be considered, but the Sony is aces in that department, I'm planning on getting one myself later this month to replace my BenQ W6000, which is also very good in the lag department.