Conker’s Bad Fur Day contains a room accessible only via cheat code that Rare populated with staff portraits, placeholder assets, and a debug menu that reveals the internal names for every game section. The room is a window into how the project was organised — the kind of developer testing space that shipped in games throughout the N64 era because removing it cleanly required more effort than leaving it.
The more interesting hidden content is in the final chapter’s structure: Conker is given the ability to access a cheat menu mid-cutscene that the game deliberately frames as a fourth-wall break, with Conker complaining to the developers about the ending he has been given and them telling him the budget ran out.
The Sunflower character — the first NPC Conker assists in the game, a morning person who needs to relieve herself on bees — was significantly altered between the game’s E3 demonstration and final release. The E3 version showed a character whose design was considered too sexual for a retail product. Rare modified the final release version, but the E3 footage circulated widely and became one of the most referenced examples of content changed between announcement and release in the N64 era.

The amount of craft that went into hiding this detail is remarkable. Pure game design artistry.
The level of craft hidden in the background of this game is genuinely moving. They made it for someone.