Hey, I know how. There is a file. Press Win+R, so there will be a popup with a Run command prompt. Type in: %localappdata%/NuclearThroneUltraMod. There will be a single file, named ntultra.sav. Open it with notepad, better with notepad++. There is many of lines, but you need to found lines with text like that: MutantUnlocked(number here)=0.000000. If you wanna unlock all of characters, just simply change every 0.000000 to 1.000000. So, when you did this, save the file and launch the game. Every character must be unlocked. This metod is called "Save Editing". If there gonna be any issues, text me.