How to Fix Tekken 8 Fatal Error (Steam Deck & PC)

January 29, 2024

Tekken 8’s launch may have been a punch to the gut for some players, especially regarding online play and the dreaded “Fatal Error.” But before you throw in the towel, there are ways to fight back! Here are some fixes and workarounds for Steam Deck and PC users:

How to Fix Tekken 8 Fatal Error (Steam Deck & PC)

Proton Hotfix

Steam Deck users, wield the Proton Hotfix like a legendary dragon punch! Here’s how to unleash its might:

  1. Open your Steam Deck library and locate Tekken 8.
  2. Click the gear icon next to the game’s title.
  3. Navigate to “Properties“, then “Compatibility“.
  4. Choose Proton Hotfix from the dropdown menu, your Steam Deck will download and apply the fix.
  5. Launch Tekken 8 and witness the error vanquished!

Run Tekken 8 As Admin With Windows 8 Compatibility

For PC warriors facing the Fatal Error, a curious time warp might hold the key. Tekken 8, crafted in the fires of Unreal Engine, may find solace in the familiar ground of Windows 8 compatibility. Here’s how to travel back in time:

  1. Navigate to your Tekken 8 installation directory and locate “Tekken 8.exe.”
  2. Right-click the executable and select “Properties”.
  3. Switch to the “Compatibility” tab.
  4. Check the “Compatibility Mode” checkbox and select Windows 8 from the options.
  5. Tick the “Run this program as an administrator” checkbox.
  6. Click OK and relaunch Tekken 8. May the error be lost in the sands of time!

Tekken 8 Fatal Error

Disable Crossplay

While crossplay promises glorious battles across platforms, it’s still a fledgling feature in Tekken 8. Therefore, we suggest temporarily sheathing it to tame the Fatal Error:

  1. From the main menu, head to “Options“.
  2. Select “Game Options Settings“.
  3. Deactivate this option to limit matchmaking to your platform.

Verifying Integrity

If none of the above solutions work, you can try verifying the integrity of your game files. This will scan your Tekken 8 installation for any corrupted or missing files and replace them if necessary. Here’s how:

  • Right-click on Tekken 8 in your Steam Library.
  • Select “Properties“.
  • Click on the “Local Files” tab.
  • Click on “Verify integrity of game files“


I hope these tips help you fix the Fatal Error in Tekken 8. If you’re still having trouble, you can also try searching for solutions online or contacting Bandai Namco support.

Related: