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Launch Options
Realm Royale Reforged
11 sourced launch options
for Realm Royale Reforged on Steam ↗ .
DXVK_ASYNC=1 %command%
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Enable asynchronous pipeline compilation in DXVK builds patched with dxvk-async
Proton-Deck
PROTON_NO_ESYNC=1 %command%
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Disable eventfd-based synchronisation (Linux, Proton)
Effect Turns off in-process esync primitives. Worth trying for games that hang or crash under Proton.
Proton-Deck
PROTON_NO_FSYNC=1 %command%
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Do not use futex-based in-process synchronization primitives
Proton-Deck
Show 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
Use the DirectX 11 renderer (Unreal Engine games)
Effect Selects DX11 as the RHI. Ignored by builds without a DX11 path.
Display
Use the DirectX 12 renderer (Unreal Engine games)
Effect Selects DX12 as the RHI. Ignored by builds without a DX12 path.
Display
Run in fullscreen mode (Unreal Engine and Source games)
Effect Overrides a saved windowed preference. -full is the same option in Source.
Display
Set the window width in pixels (Unreal Engine games)
Effect Takes its value with = and no space. Epic pairs it with -ResY and -windowed.
Example -windowed -ResX=1920 -ResY=1080
Display
Set the window height in pixels (Unreal Engine games)
Effect Takes its value with = and no space. Epic pairs it with -ResX and -windowed.
Example -windowed -ResX=1920 -ResY=1080
Display
-USEALLAVAILABLECORES
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Use all available CPU cores (Unreal Engine games)
Effect Lifts a core-count limit the engine would otherwise apply. Epic documents it as "Use all available cores."
Performance
Run in windowed mode (Unreal Engine and Source games)
Effect Unreal documents pairing it with an explicit resolution. In Source -window, -sw and -startwindowed are the same option.
Example -windowed -ResX=1920 -ResY=1080
Display
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.