For NVIDIA / AMD users:
The inability to set the display mode to "Top" in Serious Sam 3 is a frustrating issue affecting some players. While workarounds are available, players are eagerly awaiting an official fix from the developers. As more information becomes available, we will provide updates on this issue. serious sam 3 cannot set display mode top
Then in game: Options → Display → set fullscreen back on. For NVIDIA / AMD users: The inability to