Project P.I.T.T. Steam Deck Native Runtime / Proton
Steam Deck Native Runtime / Proton: The mirrored Valve compatibility record recommends native runtime.
The mirrored Valve compatibility record recommends native runtime. That does not prove every forced Proton version is better, faster or equivalent for saves.
Check the specific platform state
Record which executable/runtime is actually used before comparing behavior or file paths. No exact Proton-prefix save path or tested best Proton version is supplied here.
Evidence for this section (2)
OFFICIAL HISTORICAL · checked 2026-09-26
Valve's compatibility record lists Steam Deck Verified, native runtime and a note about manually selecting external controllers.
Build relevance: Valve compatibility test August 6, mirrored configuration checked September 26
Limit: Not a new performance benchmark of 1.0.8.
OFFICIAL HISTORICAL · checked 2026-09-26
The Steam UFS configuration names Windows, macOS and Linux roots plus save, backup and configuration file patterns.
Build relevance: Configuration mirrored by SteamDB, checked September 26
Limit: Configuration-derived locations, not a tested restore or corruption repair.
Steam app cloud-save configuration, mirrored by SteamDB ↗ Steamworks — Auto-Cloud roots and overrides ↗
Sources: Steam app launch configuration, mirrored by SteamDB ↗ · Steam app cloud-save configuration, mirrored by SteamDB ↗ · Steamworks — Auto-Cloud roots and overrides ↗
Avoid a broader claim
An official listing establishes the fields it actually publishes. It does not validate every community workaround, future feature, performance expectation or cross-platform save assumption. Keep an older compatibility test dated instead of calling it a new gameplay run.
Evidence for this section (2)
OFFICIAL HISTORICAL · checked 2026-09-26
Valve's compatibility record lists Steam Deck Verified, native runtime and a note about manually selecting external controllers.
Build relevance: Valve compatibility test August 6, mirrored configuration checked September 26
Limit: Not a new performance benchmark of 1.0.8.
OFFICIAL HISTORICAL · checked 2026-09-26
The Steam UFS configuration names Windows, macOS and Linux roots plus save, backup and configuration file patterns.
Build relevance: Configuration mirrored by SteamDB, checked September 26
Limit: Configuration-derived locations, not a tested restore or corruption repair.
Steam app cloud-save configuration, mirrored by SteamDB ↗ Steamworks — Auto-Cloud roots and overrides ↗
Sources: Steam app launch configuration, mirrored by SteamDB ↗ · Steam app cloud-save configuration, mirrored by SteamDB ↗ · Steamworks — Auto-Cloud roots and overrides ↗
A reversible diagnostic record
Keep the selected platform/runtime, input device and exact action together. If a change fails, return to the prior configuration and preserve the save backup; do not combine a file restore, a controller reset and a renderer change in one unexplained experiment.
Sources:
Evidence and verification limits
Source retrieval confirms what a source says, not a new in-game replay. Patch notes retain their version; community observations retain their limitations.
Evidence for this section (2)
OFFICIAL HISTORICAL · checked 2026-09-26
Valve's compatibility record lists Steam Deck Verified, native runtime and a note about manually selecting external controllers.
Build relevance: Valve compatibility test August 6, mirrored configuration checked September 26
Limit: Not a new performance benchmark of 1.0.8.
OFFICIAL HISTORICAL · checked 2026-09-26
The Steam UFS configuration names Windows, macOS and Linux roots plus save, backup and configuration file patterns.
Build relevance: Configuration mirrored by SteamDB, checked September 26
Limit: Configuration-derived locations, not a tested restore or corruption repair.
Steam app cloud-save configuration, mirrored by SteamDB ↗ Steamworks — Auto-Cloud roots and overrides ↗
Sources: Steam app launch configuration, mirrored by SteamDB ↗ · Steam app cloud-save configuration, mirrored by SteamDB ↗ · Steamworks — Auto-Cloud roots and overrides ↗
Primary source: Steam app launch configuration, mirrored by SteamDB ↗. Scope: full game.
A source-check date is not an in-game test date. Historical fixes and community observations retain their stated scope.