Cities: Skylines — Steam Launch Options

12 community-verified launch options for Cities: Skylines on Steam ↗.

DeveloperColossal Order

PublisherParadox Interactive

Released2015-03-10

EngineUnity Engine (heuristic)

-force-low-power-device

Uses integrated GPU for battery life (macOS).

Unity Documentation
✅ Verified
mangohud

Proton/Wine compatibility option.

ProtonDB
-popupwindow

Creates borderless popup window in Unity games.

Unity Documentation
✅ Verified
-force-opengl

Forces OpenGL rendering (legacy) in Unity games.

Unity Documentation
✅ Verified
-screen-height

Set vertical screen resolution (e.g., -screen-height 1080)

Unity Engine
-force-vulkan

Forces Vulkan rendering API in Unity games.

Unity Documentation
✅ Verified
gamemode

Proton/Wine compatibility option.

ProtonDB
-force-d3d11

Forces DirectX 11 rendering (Windows only) in Unity games.

Unity Documentation
✅ Verified
-screen-width

Set horizontal screen resolution (e.g., -screen-width 1920)

Unity Engine
-window-mode

Set window mode: exclusive, windowed, or borderless

Unity Engine
-force-d3d12

Forces DirectX 12 rendering (Windows only) in Unity games.

Unity Documentation
✅ Verified
-force-d3d9

Launch the game with the -force-d3d9

PCGamingWiki