The "CODEX" designation typically indicates a cracked version of the game released by the well-known scene group CODEX. Key Game Features & Requirements

: You play as Rindo, competing in a 24-day life-or-death battle where players must complete various missions and solve puzzles to survive.

: The file is a .rar archive, which is part of a split set (as indicated by "part1"). To extract the game, you typically need all parts of the set in the same folder.