Compatibility Report

• Name of the game with compatibility issues:
  Call of Duty 2

• Steam AppID of the game:
  2630

System Information

• GPU:
  AMD APU (Steam Deck) – RDNA2

• Video driver version:
  Mesa 24 (Steam Deck, up to date)

• Kernel version:
  SteamOS kernel 3.7.8 (latest stable at time of testing)

• Proton version:
  Proton 10.x, Proton Experimental (issue present)
  GE-Proton 8.32 (works correctly)

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

The game launches and missions start normally.
Saving during a mission also appears to work correctly.

However, after exiting the game and restarting it, attempting to resume from any save (autosave, manual save, or quicksave) causes a hard freeze during the loading screen. The game does not crash or produce any error message and must be force-closed.

Additional observations:

• Restarting the mission from Mission Select works correctly.
• Starting a new mission works correctly.
• The issue only occurs when loading an existing save after restarting the game.
• This issue occurs consistently and is fully reproducible.

Version comparison:

• GE-Proton 8.32, Proton 8.X : saving and loading work correctly.
• ** Proton 10.x / Proton Experimental**: loading any save after restarting the game consistently freezes.

This suggests a regression introduced in newer Proton versions.

Reproduction

1. Launch Call of Duty 2 on Steam Deck using Proton 9.x, Proton 10.x, or Proton Experimental.
2. Start a new campaign mission.
3. Play until an autosave occurs or create a manual/quicksave.
4. Exit the game completely.
5. Relaunch the game.
6. Select Resume Game.
7. Observe the game freezing during the loading screen.

The issue occurs every time.