Grim Dawn (80 FPS [Performance] or 60 FPS [Balanced] or 40 FPS [Quality]):

Window Mode -> Fullscreen

Screen Resolution -> 1280x800

Anti-aliasing -> On

Anisotropic Filtering -> x4 (80 FPS [Performance]) or x8 (60 FPS [Balanced]) or x16 (40 FPS [Quality])

Textures -> High

Shadows -> Medium (80 FPS [Performance]) or Very High (60 FPS [Balanced]) or Ultra (40 FPS [Quality])

Deferred Rendering -> On

UI Scale -> Default

Fullscreen Gamma -> Default

Shaders -> High (80 FPS [Performance]) or Very High (60 FPS [Balanced]) or Ultra (40 FPS [Quality])

Reflections -> Medium (80 FPS [Performance]) or High (60 FPS [Balanced]) or Very High (40 FPS [Quality])

Particles -> Medium (80 FPS [Performance]) or High (60 FPS [Balanced]) or Very High (40 FPS [Quality])

Lighting -> Medium (80 FPS [Performance]) or High (60 FPS [Balanced]) or Very High (40 FPS [Quality])

Weather -> Medium (80 FPS [Performance]) or High (60 FPS [Balanced]) or Very High (40 FPS [Quality])

Color Blindness ->

Vertical Sync -> Off

Triple Buffering -> Off

Detail Objects -> On

Alpha To Coverage -> Off

Ambient Occlusion -> Off (80 FPS [Performance]) or On (60 FPS [Balanced] or 40 FPS [Quality])

Post Processing -> On

Depth of Field -> Off

Soft Particles -> Off (80 FPS [Performance]) or On (60 FPS [Balanced] or 40 FPS [Quality])

​

(!: 45 FPS can also be used instead of 40 FPS on the Steam Deck OLED.)