Here is a simple guide on how to play Shattered in 2K resolution or 4K resolution
If you want to play at Shattered in a higher resolution than 1080p. Please follow the instructions below
– Your screen native resolution must be set before you launch the game (example : 2560×1440)
– Launch the game
– Use Windowed Fullscreen Mode
⚠️The game won’t show the right resolution in the game video option but it works.
Do not try Fullscreen mode or change the resolution in the game options. Some hardware won’t show the right resolution. Please be sure to use Windowed Fullscreen mode
The game will use your native resolution in this mode. Rather than the fullscreen won’t
Credit to Aka_Kwak