The v20191218 build holds a specific nostalgia in the PC community. It represents the "end of an era" for the classic RE Engine look before the visual overhaul for PS5/Xbox Series X.
CODEX was a well-known scene group that released cracked games and updates. They have since disbanded (announcement in early 2022). Their releases follow a strict naming format and are meant for cracked copies of games – . residentevil2updatev20191218incldlccodex upd