This specific file is a "crack" or a patch designed to bypass the copyright protection of the game. Downloading or distributing such files generally constitutes software piracy, which is illegal in many jurisdictions. Additionally, executable files from unverified sources (such as warez scene releases) carry a high risk of containing malware, viruses, or trojans.
(information) file included in the release. This file contains technical details about the update, installation instructions, and a list of fixed bugs or added features. Release Information Release Name: Ninja.Gaiden.Sigma.2.Update.v1.0.0.2-CODEX Release Date: June 2021 (approximate) Protection: General Content of the NFO Ninja.Gaiden.Sigma.2.Update.v1.0.0.2-CODEX.rar
Downloading cracked software (CODEX releases) is piracy and against the rules of most forums. If you own the game legally on Steam/console, you should get updates automatically or from official sources. This specific file is a "crack" or a