Mass Effect (2007) — Steam Launch Options

16 community-verified launch options for Mass Effect (2007) on Steam ↗.

DeveloperBioWare

PublisherElectronic Arts

Released2008-12-19

EngineUnreal Engine

PROTON_DUMP_DEBUG_COMMANDS=1

Proton/Wine compatibility option.

ProtonDB
-sm4

Forces Shader Model 4 (DirectX 10). Significant performance improvement in UE games.

Epic Games Documentation
✅ Verified
PROTON_USE_GALLIUM_NINE=1

Proton/Wine compatibility option.

ProtonDB
-windowed

Run the game in windowed mode instead of fullscreen

manual_curation
✅ Verified
PROTON_NO_ESYNC=1

Proton/Wine compatibility option.

ProtonDB
-dx11

Force DirectX 11 rendering

manual_curation
✅ Verified
-dx12

Force DirectX 12 rendering

manual_curation
✅ Verified
PROTON_NO_GLSL=1

Proton/Wine compatibility option.

ProtonDB
-vulkan

Use Vulkan renderer

manual_curation
✅ Verified
-fullscreen

Force fullscreen mode on startup

manual_curation
✅ Verified
-ResX=

Set horizontal resolution (e.g., -ResX=1920)

Unreal Engine
-ResY=

Set vertical resolution (e.g., -ResY=1080)

Unreal Engine
-USEALLAVAILABLECORES

Uses all available CPU cores in Unreal Engine games.

Epic Games Documentation
✅ Verified
PROTON_USE_D9VK=1

Proton/Wine compatibility option.

ProtonDB
PROTON_FORCE_LARGE_ADDRESS_AWARE=1

Proton/Wine compatibility option.

ProtonDB
-malloc=system

Use system memory allocator for better performance

Unreal Engine