Risk of Rain 2
20 sourced launch options for Risk of Rain 2 on Steam ↗.
DeveloperHopoo Games
PublisherGearbox Publishing
Released2020-08-11
EngineUnity
-
-nosplashCopySkip splash screensSkip-IntroPCGamingWiki Added Jun 27, 2026 Last checked Oct 19, 2026 Also documented for this game on ProtonDB · checked Nov 9, 2026Safe -
-vulkanCopyUse the Vulkan renderer where the game supports it (only engines with a Vulkan backend — Source 2, id Tech 6/7, UE4)- Effect
- Forces the Vulkan rendering backend instead of DirectX or OpenGL. Only has an effect in engines with a Vulkan path; ignored elsewhere.
DisplayPCGamingWiki Added Jun 27, 2026 Last checked Sep 27, 2026 Also documented for this game on ProtonDB · checked Nov 9, 2026Safe -
-window-modeCopyOverride fullscreen windowed mode (Unity games, Windows)- Effect
- Takes exclusive or borderless. Windows only. The flag alone does nothing — the value is required.
- Example
-window-mode borderless
DisplayUnity Engine Added Jul 8, 2026 Last checked Sep 24, 2026 Also documented for this game on PCGamingWiki · checked Sep 27, 2026Safe -
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_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=1 %command%CopyDo not use futex-based in-process synchronization primitivesProton-Deck -
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 -
WINE_FULLSCREEN_FSR=1 %command%CopyUpscale with AMD FidelityFX Super Resolution (FSR) through GE-Proton's fullscreen hack, in Vulkan games (DXVK and VKD3D-Proton included)Proton-DeckDisplay -
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 -
-force-d3d11CopyForce the Direct3D 11 renderer (Unity games)- Effect
- Windows only.
DisplaySafe -
-force-d3d12CopyForce the Direct3D 12 renderer (Unity games)- Effect
- Windows only.
DisplaySafe -
-force-openglCopyForce the legacy OpenGL renderer (Unity games, legacy builds)- Effect
- Windows only. Selects Unity's LEGACY OpenGL backend, not the core profile — use -force-glcore for that. Builds made with newer Unity versions may not carry the legacy backend at all, in which case this has no effect.
DisplaySafe -
-force-vulkanCopyForce the Vulkan renderer (Unity games)- Effect
- Useful where the default backend crashes or performs badly; ignored if the build has no Vulkan path.
DisplaySafe -
-popupwindowCopyRun in a borderless window (Unity games)- Effect
- Creates the window as a dialog with no frame. Not supported on macOS.
DisplaySafe -
-screen-heightCopyOverride the screen height (Unity games)- Effect
- Must be an integer from a resolution the game supports. Pair with -screen-width.
- Example
-screen-width 1920 -screen-height 1080
DisplaySafe -
-screen-widthCopyOverride the screen width (Unity games)- Effect
- Must be an integer from a resolution the game supports. Pair with -screen-height; alone it can leave a mismatched aspect ratio.
- Example
-screen-width 1920 -screen-height 1080
DisplaySafe
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.