protonscr

Forts

protonopen appid 410900Game compatibility - Unofficial
ValveSoftware/Proton#637 · opened 2018-08-26 by DenisBY · updated 2025-06-24 · 4 comments · github · game page · search this game
DDenisBY 2018-08-26 github

See screenshot: https://i.imgur.com/2c2n3VZ.png
My sysinfo
Maybe related to issue https://github.com/ValveSoftware/steam-for-linux/issues/5644 because during checking files integrity in Steam it downloads 0 bytes

EElricleNecro 2019-05-30 github

I am also having this issue, after a few minutes of playing a game.
My sysinfo.

Kkisak-valve maintainer 2023-12-19 github

Forts using vulkan renders everything transparent and dark

Issue transferred from https://github.com/ValveSoftware/Proton/issues/7362.
@tristanjl posted on 2023-12-19T00:19:32:

Compatibility Report

  • Name of the game with compatibility issues: Forts
  • Steam AppID of the game: 410900

System Information

I confirm:

  • I confirm that I haven't found an existing compatibility report for this game.
  • I confirm that I have checked whether there are updates for my system available.

steam-410900.log

Symptoms

When vulkan rendering is enabled, everything in the game looks darker and transparent
When captured in render doc, the output pixel value is approximately 1/4 the alpha is should be. Due to blend modes, this is then multiplied through the colour, hence why everything looks dark
When debugging the shader in render doc, the pixel value result appears to be the correct value - but it does not match the actual pixel value.
In testing a debug build, it renders correctly run from wine directly (including wine used by proton). It also appears correct when disabling Vulkan (which uses OpenGL)

Reproduction

Go to Options -> Video
Ensure 'Enable Vulkan' is checked
Restart the game
Notice that everything appears transparent and darker

Ttristanjl 2023-12-19 github

Also, I have encountered 2 crashes calling steamworks api functions when running under proton (no issue under windows)

This happens with multiplayer - when you host a lobby and then either:

Quit hosting - application exits on SteamGameServer_Shutdown()
Player joins the game - application exits on SteamGameServerNetworking()->AcceptP2PSessionWithUser( pCallback->m_steamIDRemote );

Ttristanjl 2025-06-24 github

Forts using vulkan renders everything transparent and dark

This issue now appears to be fixed for up to date steam deck.

Also, I have encountered 2 crashes calling steamworks api functions when running under proton (no issue under windows)

This happens with multiplayer - when you host a lobby and then either:

Quit hosting - application exits on SteamGameServer_Shutdown() Player joins the game - application exits on SteamGameServerNetworking()->AcceptP2PSessionWithUser( pCallback->m_steamIDRemote );

Both of these appear to be fixed on up to date steam deck.

Upstream links