Which model do you have? Have a go at a Soft Reset on your TV and let us know how you get on, to do this head over to > Settings > Support > Self diagnosis > Reset.
It's worth checking to see if the software is up to date on your TV too, to check go to > Menu > Support > Contact Samsung.
I have the same issue with my un48h6400. The games icon is gone. I reset and updated the smart hub. still the same. Asking for help through the support on the menu, no one got back so far.
The fix is: Unplug game device from the HDMI in back of the TV
Turn off TV and gaming device
Turn on TV FIRST
Turn on gaming device
Connect HDMI to TV from gaming device while powered on. The TV will then find and add the logo. You can check by pressing the source button to see what is connected.