AMD's FSR 4 gets a big boost in compatibility as OptiScaler now supports upconverting any modern upscaler to FSR 4 with frame-gen, as long as the game isn't Vulkan-based or has anti-cheat

Thanks to OptiScaler, any game featuring DLSS 2+ or FSR 2+ can now be modded to support FSR 4, as long as it doesn't need Vulkan or an anti-cheat. Also, you need an RX 9000-series GPU and a decent amount of patience to make it all work.