Space Marine 2 supports "fullscreen," "borderless" and "windowed"
Supported aspect ratio is 16:9 only, no 21:9, no 32:9, not even 16:10. As you can see, our Steam Deck screenshots have black bars on top and bottom
The "Render Resolution" option lets you control the upscaling, options available are "native," "quality," "balanced," "performance," "ultra performance," and "dynamic," which uses the "Dynamic Resolution FPS Target" option further below
"Resolution Upscaling" lets you select the actual upscaler used, options are "TAA," "FSR2" and "DLSS"
There is no support for Frame Generation
V-Sync can be disabled completely, there is no hidden FPS cap
You can set "Motion Blur Intensity" to "off," which really is just "low." As you can see on our screenshots, there is still some blur for animations
An FPS limiter is available, which can be freely set to 30, 60, 90, 120 or off
The "Quality" presets available are: "low," "medium," "high" and "ultra"
In addition to that, there is a solid list of options to fine-tune performance
The little triangles in front of the menu options are used to indicate "setting not at default value"
Test Devices
We tested the public Steam release of Warhammer 40000: Space Marine 2. The Steam Deck LCD was running SteamOS version 3.5.19, build 20240422.1. Our ROG Ally had the latest Armoury Crate version installed at the time of testing (1.5.11.0) along with BIOS 339.