Warhammer 40,000: Space Marine 2
19 sourced launch options for Warhammer 40,000: Space Marine 2 on Steam ↗.
DeveloperSaber Interactive
PublisherFocus Entertainment
Released2024-09-09
EngineSwarm Engine
-
DXVK_ASYNC=1 %command%CopyEnable asynchronous pipeline compilation in DXVK builds patched with dxvk-asyncProton-Deck -
MANGOHUD=1CopyShow the MangoHud performance overlay (Linux)- Effect
- Draws FPS, frame timing and CPU/GPU load over Vulkan and OpenGL games. MangoHud runs the game, so %command% is what it runs.
- Example
mangohud %command%
Proton-Deck -
PROTON_ENABLE_NVAPI=1 %command%CopyEnable NVIDIA's NVAPI GPU support libraryProton-Deck -
PROTON_ENABLE_WAYLAND=1 %command%CopyUse Wine's experimental Wayland driver instead of the default X11 driver, in GE-Proton and Proton-CachyOS (Valve's Proton does not include it)Proton-Deck -
PROTON_FORCE_LARGE_ADDRESS_AWARE=1 %command%CopyForce the LARGE_ADDRESS_AWARE flag (Linux, Proton)- Effect
- Lets 32-bit executables address more than 2 GB. Valve documents it as enabled by default, so setting it explicitly is usually a no-op.
Proton-DeckValve Proton Added Jul 8, 2026 Last checked Sep 13, 2026 Also documented for this game on ProtonDB · checked Nov 9, 2026Safe -
PROTON_NO_D3D11=1 %command%CopyDisable d3d11.dll (Linux, Proton)- Effect
- For d3d11 games that can fall back to d3d9 and run better that way.
Proton-DeckDisplayValve Proton Added Jul 9, 2026 Last checked Sep 13, 2026 Also documented for this game on ProtonDB · checked Nov 9, 2026Safe -
PROTON_NO_ESYNC=1 %command%CopyDisable eventfd-based synchronisation (Linux, Proton)- Effect
- Turns off in-process esync primitives. Worth trying for games that hang or crash under Proton.
Proton-DeckValve Proton Added Jul 8, 2026 Last checked Sep 13, 2026 Also documented for this game on ProtonDB · checked Nov 9, 2026Safe -
PROTON_NO_FSYNC=0 %command%CopyExplicitly turn off Proton's nofsync setting, so futex-based synchronization is usedProton-Deck -
PROTON_NO_FSYNC=1 %command%CopyDo not use futex-based in-process synchronization primitivesProton-Deck -
PROTON_USE_WINED3D=0 %command%CopyProton-DeckDisplay -
PROTON_USE_WINED3D=1 %command%CopyUse wined3d (OpenGL) instead of DXVK (Linux, Proton)- Effect
- Routes d3d11, d3d10 and d3d9 through OpenGL-based wined3d rather than Vulkan-based DXVK. Usually slower; a fallback where DXVK fails.
Proton-DeckDisplayValve Proton Added Jul 9, 2026 Last checked Sep 13, 2026 Also documented for this game on ProtonDB · checked Nov 9, 2026Safe -
VKD3D_CONFIG=descriptor_heap %command%CopyA list of options that change the behaviour of vkd3d-protonProton-DeckDisplay -
VKD3D_CONFIG=descriptor_heap,no_upload_hvv %command%CopyA list of options that change the behaviour of vkd3d-protonProton-DeckDisplaySafe -
VKD3D_CONFIG=force_raw_va_cbv,nodxr %command%CopyA list of options that change the behaviour of vkd3d-protonProton-DeckDisplaySafe -
VKD3D_CONFIG=no_upload_hvv %command%CopyA list of options that change the behaviour of vkd3d-protonProton-DeckDisplay -
WINEESYNC=1 %command%CopyTurn on eventfd-based synchronization (esync) in Wine builds that implement itProton-Deck -
WINEFSYNC=1 %command%CopyTurn on futex-based synchronization (fsync) in Wine builds that implement itProton-Deck -
gamemoderun %command%CopyRun the game under Feral GameMode (Linux)- Effect
- Applies temporary host optimisations (CPU governor, I/O and process priority) for the game's lifetime, then restores them on exit. GameMode runs the game, so %command% is what it runs.
Proton-DeckFeral GameMode Added Jun 29, 2026 Last checked Sep 24, 2026 Also documented for this game on ProtonDB · checked Nov 9, 2026Safe -
mangohud %command%CopyShow the MangoHud performance overlay (Linux)- Effect
- Draws FPS, frame timing and CPU/GPU load over Vulkan and OpenGL games. MangoHud runs the game, so %command% is what it runs.
Proton-Deck
How to apply a launch option on Steam
- Open Steam and go to your Library.
- Right-click the game and choose Properties.
- On the General tab, find the Launch Options field.
- Type or paste the option (e.g.
-windowed) into the field. To use several at once, separate them with spaces (e.g.-windowed -novid). - Close Properties. Steam saves automatically, and the option applies next time you launch the game.
To remove one, reopen the same field and delete the text. Options are game-specific; an option that helps one game may do nothing (or misbehave) in another.
Worth knowing: a launch option can break a game's rendering, reset local settings, or trip anti-cheat in multiplayer. Read the description first, add one at a time, and treat anything rated above Safe as a deliberate experiment.
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