Not getting full screen on playing games!

[lethal.industry]

Hi guys my surface pro was fine playing games at full screen not until today when my battery ran low and i went back playing the walking dead my screen isnt on full screen anymore! tried to change the settings and played other games but it wont go back to normal

 

[Igor]

I have no experience with The Walking Dead specifically but did you try pressing Alt+Enter when you are in-game? That sometimes toggles between full screen and windowed mode.