There has been a lot of discussions on this topic, all ended with "fraps?". But let's try it again. By fps counter I really mean _only_ displaying fps of game (no recording). It should be optionaly activatable in Steam setting and/or directly from overlay.
Reasons: - Since steam already injected game's rendering pipeline the fps information is already there, it just needs to be displayed - not all games has option to display fps and it's just stupid to remember/google commands to enable it for each game engine (please do NOT replay with "cl_showfps 1" or "/cg_drawfps 1" ...) - why should I install third party tool (fraps) for such a simple task as displaying fps - You can NOT use fraps on linux and since SteamOS is linux based there is no fraps for SteamOS - valve want us to test their SteamOS (with this awesome/crazy in-home streaming feature), how the hell should I test performance?