Serious Sam 3: BFE is a beloved first-person shooter that throws hordes of enemies at you in glorious, over-the-top chaos. However, for many players on PC—particularly those with modern hardware or multi-monitor setups—the game often refuses to start, crashing immediately with a frustrating error message: "Cannot set display mode."

Now stop reading and go hunt some Headless Kamikazes. Good luck, Sam! Did this guide help you? If a different solution worked, sharing it in the community forums helps fellow players still stuck on the "display mode" error screen.