For the most up-to-date and safe experience, I recommend obtaining game updates through official channels:

Around mid-to-late 2021, Team Ninja and publisher Koei Tecmo rolled out for the Steam version. This is likely the update mentioned in your keyword.

A Codex RAR file typically refers to a compressed archive file (in RAR format) containing digital content related to a game, in this case, possibly related to Nioh 2. The term "Codex" might imply a comprehensive guide or a collection of data, such as game cheats, strategies, or resources.

: This update officially integrated NVIDIA DLSS (Deep Learning Super Sampling), allowing players with RTX graphics cards to significantly boost frame rates without sacrificing image quality.

Update v1.27 was a significant patch for the PC port aimed at addressing performance issues and adding specific features:

It's not uncommon for game enthusiasts or dataminers to create and share RAR files containing game data, including updates like version 1.27.00. These files can be used to manually update the game or to extract specific assets for modding or analysis purposes.

Even if you ignore piracy concerns, here are real risks you face by downloading the keyword-targeted file:

For the most stable experience, users are encouraged to update to the latest version available on the Nioh 2 Steam Page .