Er0000.co2.bak -

Below is a draft for a blog post aimed at helping players manage or recover their progress using this specific file.

: Inside, you'll see a folder named with a long string of numbers (your Steam ID). Open it. ER0000.co2.bak

the game using the Seamless Co-op launcher. Your previous save state should now be active. 4. Pro-Tip: Converting Vanilla Saves Below is a draft for a blog post

Before you can fix anything, you need to find where the game hides your progress. ER0000.co2.bak

The .bak file is an automatic backup created by the game or mod. You should use it if: Your game says Your characters have disappeared from the load screen.