War in the North Steam Deck Settings and Performance

SteamDB currently lists Windows support, not a verified Steam Deck rating. A handheld report describes performance collapsing after entering the game under SteamOS, so settings guidance remains provisional rather than a tested universal preset.

Status: Handheld support is partial; one current SteamOS slowdown report is not a complete benchmark.

What we know

• The PC build is 64-bit and lists DirectX 12-related modern metadata.
• Windows support does not guarantee Proton or SteamOS behavior.
• One device report mentions a drop near 1 FPS after leaving the menu.

What to do now

1. Start at native handheld resolution with a 30 FPS cap and conservative effects.
2. Test a short gameplay section before applying a long battery or quality profile.
3. Record SteamOS, Proton, game version, power limit, resolution, and the scene where slowdown begins.

Evidence boundary

The initial settings are a safe diagnostic baseline, not a benchmarked best preset. Update after repeatable Deck measurements become available.