Dead Island 2 has native ultrawide support for gameplay. Here's a fix to get ultrawide support for the cutscenes too, thanks to Lyall. : r/widescreengamingforum

3 Years with Ultrawide Display - Support Summary in 80 games I've played/tested

3 Years with Ultrawide Display - Support Summary in 80 games I've played/tested

Dead Island 2 - 21:9 Support kinda? : r/ultrawidemasterrace

Technical FAQs

New Patch Broke Tanking on Ultrawide : r/HellLetLoose

3 Years with Ultrawide Display - Support Summary in 80 games I've played/tested

Dead Island 2 Haus DLC 2-Player Co-Op Ultrawide PC Gameplay [3440 x 1440] - No Commentary

Anyone else having ultrawide issues? : r/deadisland

Dead Island 2 4080 GeForce NOW Ultimate Ultrawide Performance & Gameplay

Dead Island Definitive Edition - 5120 x 1440 - Ultra Wide Gaming - 32:9