The Lord of the Rings: War in the North™ - Legacy Edition (2523770)

Compatibility Report

Name of the game with compatibility issues: The Lord of the Rings: War in the North — Legacy Edition

Steam AppID of the game: 2523770

System Information

GPU: AMD Radeon RX 6600

Video driver version: Mesa (CachyOS)

Kernel version: 7.2.0-1-cachyos (64-bit)

Link to full system information report as [Gist](https://gist.github.com/): [User System Gist Placeholder]

Proton version: GE-Proton 9-5 (Older versions <=8 break multiplayer or fail to launch; newer versions >=9-6 cause severe stuttering starting right from the menus)

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 suffers from major regressions across different Proton branches:

Proton versions 8 and below either fail to launch entirely or completely break multiplayer matchmaking and lobbies.

Proton versions 9.0 and newer trigger severe, unplayable stuttering and performance tanking starting immediately from the main menus and carrying into gameplay.

GE-Proton 9-5 is currently the only known version that successfully maintains functional multiplayer while running smoothly without menu or gameplay stutter.

Small mouse inputs do not get picked up. Almost like a deadzone is stuck on. If you move faster it works. Mouse accuracy is also very bumpy.

Reproduction

Launch the game using official Proton 9+ or GE-Proton 9-6+.

Notice severe, persistent stuttering immediately upon reaching the main menu and throughout the interface.

Switch compatibility tool to GE-Proton 9-5.

Menus and gameplay run smoothly with fully functional multiplayer.

steam-12187657812028948480.log

No project file or test is named in the report. Start by reproducing the game with GE-Proton 9-5, official Proton 9+, and GE-Proton 9-6+ while reviewing the attached steam log. Done would require identifying a reproducible Proton regression and confirming behavior after an appropriate fix.