Direct answer
Use the official launch option: Steam uses /borderless, while Epic uses -borderless.Independent fan reference · verified facts are dated Sep 1, 2026.
Steam setup
In Steam, right-click the game title, choose Properties, then set the launch option to /borderless. The same official support article also lists /windowed and /fullscreen. Keep the slash prefix exactly as shown for Steam.
Epic setup
In Epic, enter -borderless in Additional Command Line Arguments. The official article lists -windowed and -fullscreen too. The prefix differs from Steam, so copying the Steam form into Epic would not follow the published instruction.
If it does not work
The supplied P0 material confirms the launch arguments but does not establish a troubleshooting order, display-driver fix, or performance outcome. Mark those questions as pending and check current official support material before changing more settings.

How can I set launch options for theHunter: Call of the Wild?
Official source · accessed Sep 1, 2026
Read originaltheHunter: Call of the Wild | Announcement Trailer
The title is preserved as “Announcement Trailer”; it is not labelled a launch trailer.



