In "Call Of Duty: Zombies", completing which map's main easter egg will reward you with the achievement, "Little Lost Girl"?

The reason why completing the main Easter Egg in the Origins map of Call of Duty: Zombies rewards players with the achievement "Little Lost Girl" is because Origins is considered one of the most complex and challenging maps in the game. It requires players to complete a series of steps and objectives, including activating four staffs, solving puzzles, locating hidden parts, and overcoming powerful enemies and bosses. The completion of all these tasks culminates in the release of Samantha Maxis and the achievement of the "Little Lost Girl" trophy.