Compatibility Report

Name of the game: SUPERVIVE
Steam AppID: 1283700

System Information

• GPU: NVIDIA GeForce RTX 5070
• Driver version: 595.58.03
• Kernel version: Nobara (Fedora-based, recent kernel)
• Proton version(s) tested:
  • Proton-GE 10.34
  • Proton Experimental

Symptoms

The game launches correctly and reaches the main menu.
The Steam overlay works and the "Login with Steam" button is clickable.

However, when attempting to log in via Steam:

• The loading spinner appears and runs indefinitely
• After some time, a connection error is shown in-game
• No login window or browser interaction appears

Logs / Key Observations

From Proton logs:

• Steam authentication starts correctly:

  LogOnlineIdentity: STEAM: Obtained steam authticket
  LogLokiAuthManager: Attempting to login with Steam
  

• Web/CEF components are loaded:

  • EpicWebHelper.exe
  • libcef.dll
  • chrome_elf.dll

• Then repeated HTTP connection closures:

  LogHttp: Warning: libcurl info message (Closing connection)
  

• Followed by browser destruction:

  LogWebBrowser: Closing browser during destruction
  LogWebBrowser: Deleting browser for Url=.
  

• And multiple exceptions:

  Exception 0xc0000005
  

The login flow appears to fail after Steam auth ticket retrieval, during the embedded web authentication stage.

Reproduction

1. Install the game via Steam
2. Force Proton (GE or Experimental)
3. Launch the game
4. Reach main menu
5. Click "Login with Steam"
6. Observe infinite loading followed by connection error

What was tested

• Proton-GE 10.34
• Proton Experimental
• Fresh prefix (compatdata removed)
• File integrity verification
• No launch options
• With Proton options:
  • PROTON_NO_ESYNC=1 PROTON_NO_FSYNC=1
  • PROTON_USE_WINED3D=1

No change in behavior.

Expected behavior

Steam login should complete successfully and allow access to online services.

Actual behavior

Login attempt fails after Steam auth ticket retrieval.
Embedded web browser closes prematurely, resulting in connection error.

Additional notes

• Steam overlay works correctly
• Steam auth ticket is successfully obtained
• Issue likely occurs in web/CEF layer or HTTP handling under Proton

This may indicate a regression or incompatibility in the game's authentication stack with Proton.