Cracking is a necessary prerequisite for any repack, and the v20191218 package you're researching is specifically a CODEX release. It bundles the official game update with CODEX's "crack"—the modified files that trick the game into thinking it's a legitimate, activated copy.
While the official patch was 1.2GB and the CODEX patch was roughly 1.2GB, applying it to a repack was messy. FitGirl released an (approx. 380 MB) that applied the CODEX changes to her existing base repack of the game. This delta patch used binary diffing (using tools like xdelta3 ) to modify the already compressed game archives without requiring a full redownload. Cracking is a necessary prerequisite for any repack,
Released near the end of 2019, the v20191218 update (often referred to as Update 5) was a significant patch aimed at refining the gameplay experience and ensuring stability. Key aspects of this update included: FitGirl released an (approx