To officially "beat" the game and see 100% on your save file, you must defeat The Devil on Regular difficulty . Beating bosses on "Simple" will not grant you the soul contracts needed to finish the game.
Since this is the GOG version, it is DRM-free. You can simply run the installer found inside the ZIP. If you're running it on older systems like Windows XP, you'll need specific DLLs ( bcrypt.dll and kernel35.dll ) placed in your game folder to get it working. Cuphead.v1.3.4-GOG.zip
The game is famous for its 1930s hand-drawn animation style and a soundtrack that won multiple awards for original music and art direction. To officially "beat" the game and see 100%
If you're looking for help with the version, here’s a quick guide covering everything from setup to achieving that elusive 100% completion. Quick Setup & Technical Tips You can simply run the installer found inside the ZIP
Are you stuck on a , or are you having trouble with the installation process ? Cuphead on Steam
Once you beat the game on Regular, you unlock Expert Mode . Replaying the game on this difficulty can push your completion percentage up to 200% .