zkus spustit hru v režimu kompatability - např. win xp sp3
ve steamu kliknout na ověření souborů

Jinak jakou máš gpu?

Také můžeš zkusit pustit hru v safe modu - najdeš soubor, otevřeš v poznámkovém bloku a přepíšeš z false na true

If you have issues launching the game; it's possible to run in safe mode. This option will force the windowed mode in 800x600 with the lowest graphical settings.

To launch in safe mode, you have to edit the file StyxGame.ini which is located at '\Documents\My Games\Styx\StyxGame\Config'
Then find the line bLaunchSafeMode=false and modify the line to bLaunchSafeMode=true.

Save the file and launch the game from Steam.