If you choose to use a shared save from platforms like Nexus Mods or Speedrun.com , follow these steps to install it:

Enter the .

Achieving a "Perfect" rank by meeting strict requirements for Time, Kills, and Style without dying or restarting.

Perhaps the most overlooked aspect of a 100% save is the Data Logs . Every enemy, weapon, and environmental element has a lore entry. A legitimate 100% save implies the player has scanned every enemy type—including the rare, hidden variants like the Malicious Face (specifically the one that has to be punched) and the Idol combinations.

: Each level contains hidden blue and gold Soul Orbs. Finding them all is mandatory for completion.

Successfully completing the unique mission-specific challenges (e.g., "Don't touch any water" in 5-1).

Once you have your SaveFile_0.dat (or similar), follow these steps:

A 100% save isn't just about the main path. It requires finding and completing the Prime Sanctums and Secret Missions .

In ULTRAKILL, "100%" goes beyond just reaching the credits. It requires completing every challenge the game currently offers across all available Layers (Prelude through Violence).

Here is a look at what constitutes a 100% save, why people hunt for them, and the dark souls-like persistence required to achieve one legitimately.

Simply finishing a level isn't enough. To truly 100% the game, a player must P-Rank every level currently available.