What the sources establish
The official description requires one code in addition to four keys. The source corpus includes a walkthrough titled for codes, key locations, and the ending; use the footage to understand the sequence and inspect the in-game clues or input prompt yourself.
Use the evidence carefully
This is not a list of promotional redemption codes, and the supplied sources do not verify a permanent numeric answer. Avoid copying a code from an old video without checking the current game state.
Source note
This guide is based on the supplied MONOCHROME research corpus and the live Roblox game description. Video material is used as a real gameplay reference; it is not presented as an official patch note.