protonscr

Tentacular

protonopen appid 1220100Game compatibility - UnofficialMesa driversAMD RADV
ValveSoftware/Proton#9411 · opened 2026-01-19 by Patola · updated 2026-01-19 · 3 comments · github · game page · search this game
PPatola 2026-01-19 github

Compatibility Report

  • Name of the game with compatibility issues: Tentacular
  • Steam AppID of the game: 1220100

System Information

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 doesn't start, instead it seems to hang steam flatscreen interface (the VR interface continues responding). The game never appears in the VR headset and with proton 10.0-3 and experimental it opens up an invisible window in the flatscreen -- on proton 8.0-5 it at least makes the flatscreen go black, but still doesn't start. The proton processes running Tentacular.exe are there but they seem to be unresponsive. The only way to get steam to recover and start responding again is by making the game exit forcefully from the VR interface.

Reproduction

Install the game, connect to VR and from SteamVR, press play.

Notes

the log is for Proton 10.0-3, if you need logs for any other version just let me know.

steam-1220100.log

PPatola 2026-01-19 github

It's curious that even calling the game from the flatscreen with VR off makes steam hang. This might not have to do with VR but the way the game initializes, I guess?

PPatola 2026-01-19 github

So, I've tested with an older kernel -- 6.16.11 -- to ensure it's not something from the very recent kernel I'm using and the same issue appeared. Next step is trying on a different graphical card.

PPatola 2026-01-19 github

Bingo. This does not happen on NVIDIA. So it's a bug in Mesa. How to report it, though?

Proton versions