Anyone can access the public test branch of the game by simply entering the password into the beta selection in steam and selecting the branch from the drop down menu.

The view the change log for the public test branch this can be view within the game via the main menu.

MAKE SURE YOU BACKUP YOUR SAVE FILES
Save Location : Documents\My Games\Remnants\Saves

HOW TO SWITCH TO PUBLIC TEST
https://gyazo.com/65b1abfd3a650bed3f33cb3775259913