Martin Hollis, the director behind the acclaimed GoldenEye 64 told attendees at GDC Europe that the incredibly addictive multiplayer component was built within a month, and had no prior approval from the management at Rare, or Nintendo.

“It was done without the knowledge or permissions of the management at Rare and Nintendo, he laughed, noting that if the team had not put it together on the sly before showing it to management, there’s no way it would have been allowed — the game was already late as it was.”