Subnautica 2 Keeps Crashing? Fix!

There is nothing worse than sitting down to play Subnautica 2 only to have it kick you back to your desktop the second it tries to launch. If you are using an AMD RX 9000 series GPU, you have likely hit a confirmed incompatibility with the latest driver version, though corrupted files or shader caches can also cause the same frustrating behavior.

Why this happens

The primary cause is a driver conflict between AMD Adrenaline 26.5.1 and the game engine on RX 9000 series cards. In other cases, the game struggles to load due to outdated shader cache files or incorrect file system permissions.

What you'll need

Make sure you have your Steam client open and administrative access to your PC. If you are rolling back drivers, download the 26.3.1 installer from the official AMD website before starting.

Steps

1. 01
   If you have an AMD RX 9000 series card, download Adrenaline 26.3.1 from the AMD website and run the installer. Select the 'factory reset' option to ensure no corrupted files from the 26.5.1 driver remain.
2. 02
   Open Steam, right-click Subnautica 2 in your library, and select Properties. Navigate to the 'Installed files' tab and click 'Verify integrity of game files' to repair any missing or corrupted installation data.
3. 03
   In the same Steam Properties window, click 'Browse' to open the game installation folder. Right-click the Subnautica 2.exe file, select Properties, go to the Compatibility tab, and check 'Run this program as an administrator' and 'Disable fullscreen optimizations'.
4. 04
   Press Win+R on your keyboard, type %LOCALAPPDATA%, and hit Enter. Locate the Subnautica 2 or 'Unknown Worlds' folder and clear the contents, ensuring you leave your 'Saved Games' folder untouched to prevent data loss.

Still not working?

If you are still crashing, check your Windows Event Viewer under 'Windows Logs' -> 'Application' for 'Application Error' entries at the time of the crash. If you see a reference to ntdll.dll, you may have a deeper system file corruption that requires running sfc /scannow in an elevated Command Prompt.

Frequently asked questions

Will clearing my shader cache delete my game saves?

No, as long as you do not delete the specific 'Saved Games' folder inside the Subnautica 2 directory, your progress will remain intact.

Do these fixes affect other games?

Rolling back your AMD driver might impact performance in other recent titles, but it is necessary for Subnautica 2 stability until the developers release a patch.