What does Game Mode do?
Game Mode is available on all current Samsung TVs. When you set a video source (input) to Game mode, your TV electronically bypasses two of the video signal processors in the TV, subsequently cutting down the amount of time the TV needs to process the video input from your game. You may notice a slight difference in the picture, but after you implement Game mode there should be reduction of any lag between the game system and the TV.
Game mode is available for AV1, AV2,Component, but not HDMI or DVI. To find out which sources Game mode is available for on your TV, see your users manual. Look for a section titled Using Game Mode. If you set your TV to a source for which Game mode is not available, Game mode will be grayed-out on your TV's menu and inaccessible.
Note: Depending on your TV, Game mode might not be available for all input sources.