Luigi's Mansion time limit

Luigi's Mansion was subject to a rumor that early versions of the game had to be beaten under a time limit, or the mansion would disappear forever, with Mario still inside, before Luigi could save him.

No evidence of this mechanic or ending sequence has been found in prerelease footage, nor in the game's data.

The rumor is thought to be a misinterpretation of the 90-second timer of the game's E3 2001 demo. The short play time is a common feature of public demo kiosks, prompting someone else to try the game. Additionally, this may have been conflated with a US commercial that states "You've got one night to save Mario from the supernatural", referring to the game's scenario but not its mechanics.