Gaming Settings
To have the best input lag while playing games via a video game console or PC, you can keep the general settings mentioned above and turn on 'Game Mode' from the 'External Device Manager'. If you are playing on a PC, then set the input icon to 'PC' if you want to enable the chroma subsampling.
HDR Gaming Settings
For HDR gaming apply the same HDMI settings mentioned in the HDR settings and game settings above. Note that when in game mode, the TV won't change the backlight setting and the local dimming setting automatically, so it is preferable to set the backlight to max and set the local dimming to high.