In ULTRAKILL, "100%" usually implies P-Ranks on all levels and unlocking the Prime Sanctums (Minos Prime and Sisyphus Prime). Using a save file gives you access to these bosses, but if you haven't earned them yourself, you will likely find them impossibly difficult.
doesn't have a built-in "cloud share" for saves, players usually share them through community hubs: Speedrun.com ultrakill 100 save file
For advanced users, it's possible to manually edit your save files using a (such as HxD) to fine-tune your progress or fix issues. In ULTRAKILL, "100%" usually implies P-Ranks on all
For some, earning it yourself is the point. For others, the 100% save is a tool — a way to jump straight into the real game: perfecting movement, routing, and style. For some, earning it yourself is the point
Jump straight into the endless wave survival mode with all enemy types unlocked from the start.