Patch 1.3 wasn't just another small fix; it was the update that introduced the first pieces of to the game. This included:
The "CODEX" tag indicates this was a release by a prominent group in the digital preservation and cracking scene. Since Cyberpunk 2077 was released DRM-free on GOG, these versions were often used by players to trial the game or maintain specific historical versions before newer, game-changing updates (like the 2.0 overhaul) completely changed the talent trees and police systems. How to Handle Split RAR Archives Cyberpunk.2077.v1.3-CODEX.part04.rar
Patch 1.3 — list of changes - Home of the Cyberpunk 2077 universe Patch 1
Seeing a "part04.rar" means the game was split into many smaller pieces to make downloading easier. To use this file correctly: How to Handle Split RAR Archives Patch 1
: Right-click only on "part01.rar" and select "Extract Here." Your extraction software (like WinRAR or 7-Zip) will automatically pull data from part04 and all other segments to recreate the full installer.