CODEX, short for Codex Group, is a well-known cracking group that releases game cracks, patches, and updates. They are particularly famous for cracking games that use advanced DRM (Digital Rights Management) protection, making them playable for gamers who don't own the game or can't access it due to regional restrictions.
largely concluded in 2021 as focus shifted to its standalone expansion, Gates of Hell: Ostfront Call to Arms Update v1.110-CODEX