protonscr

Some sort of regression in Proton versions after 10 causes Natural Selection 2 file inconsistency errors when connecting to a game server

protonclosed
ValveSoftware/Proton#9917 · opened 2026-06-29 by s1LenT0R · updated 2026-06-29 · 1 comments · github
Ss1LenT0R 2026-06-29 github

Compatibility Report

  • Name of the game with compatibility issues: Natural Selection 2
  • Steam AppID of the game: 4920

System Information

  • GPU: RX 6600
  • Video driver version: Mesa 26.0.7
  • Kernel version: 6.18.35-gentoo-dist
  • Proton version: 11

I confirm:

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

Symptoms

Game reports file inconsistency for LUA game scripts compared to the game server's version.

Reproduction

Use a higher Proton version than 10, connect to game server.

Got fixed by

Downgrading Proton to 10 helped so there must be some sort of regression in newer versions.

Kkisak-valve maintainer 2026-06-29 github

Hello @s1LenT0R, we're using one issue report per unofficially supported game title, so I've gone ahead and transferred this issue report to https://github.com/ValveSoftware/Proton/issues/2234#issuecomment-4832933462.

Upstream links