The Ultimate Ultrakill 100% Save File Guide: Why You Need One and How to Use It
SaveFile0.sav with Notepad++ or VS Code."levelProgress" and "weaponUnlocks" – edit booleans/ranks carefully.Inside, you will see a file named SaveFile.ini.
If you use a save file to skip the grind, we recommend still going back and trying to earn those ranks yourself. The weapons are just tools; the real "100%" is the skill you develop along the way. MANKIND IS DEAD. BLOOD IS FUEL. HELL IS FULL.