Here’s a helpful post on the Grand Theft Auto Codex, covering what it is, why it matters, and how to use it. The GTA Codex (often found at gtacodex.com or via archival communities) is a fan-driven, encyclopedic project dedicated to documenting the entire Grand Theft Auto series in extreme detail. Think of it as a combination of a wiki, a cut content archive, a script library, and a technical reference — but with a focus on accuracy, source citation, and preservation .