While it didn't introduce new gameplay mechanics like weapons or levels, it was the final step in a rapid succession of patches (v1.21.01 through v1.21.06) that added essential PC features that were missing at launch, such as:
The suffix is a signature of one of the most prolific digital "warez" groups in history. Nioh.Complete.Edition.Update.v1.21.06-CODEX.rar