Compatibility Report

• Name of the game with compatibility issues: Timberborn
• Steam AppID of the game: 1062090

System Information

• GPU: NVIDIA GeForce RTX 4070 Ti
• Video driver version: 580.82.09
• Kernel version: 6.16.3-76061603-generic (Pop!_OS 22.04 LTS)
• Link to full system information report as Gist
• Proton version: Proton Experimental, Proton Hotfix, Proton 10.0-2 (Beta), GE-Proton 10-18 – all tested

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

Since the Timberborn patch from 2025-10-13 (main branch), dragging with the mouse is broken when playing via Proton. This affects:

• Camera movement
• Area selection (for farming, tree cutting, demolition zones, etc.)
• Placing and deleting structures

Example:
Placing a 12×12 farm used to be done with a single click-and-drag.
Now I have to click 144 times to place the same area.
Same applies to removing buildings or marking tree zones.

This issue makes the game extremely tedious and nearly unplayable for Linux/Steam Deck users.

Reproduction

1. Launch Timberborn via any Proton version (including Proton Experimental, GE 10-18, etc.)
2. Start a new game or load a save
3. Attempt to click-and-drag to place or delete a building area
4. Observe that dragging does not work – each tile must be clicked individually

Note: The game uses Unity and the issue appeared immediately after Timberborn updated to a newer Unity version on Oct 13, 2025.

The developers (Mechanistry) have confirmed the bug and released an “unsafe” legacy branch as a temporary workaround. A proper fix may require Proton compatibility for the new Unity behavior.

🔧 A PROTON_LOG=1 log file is available and will be attached to this issue.

steam-1062090.log