| This room was a temporary room.
It could only be found in Club Penguin for a certain period of time. It may or may not have returned later.
|Where||Under the Stage|
|Opened|| November 13, 2009 |
April 15, 2011
|Closed|| December 25, 2009 |
May 20, 2011
The Underground was an additional room that was added during the Norman Swarm Has Been Transformed play at the Stage. It was located under the Stage. To find it, you needed five penguins standing on some O's near a boulder (at least one must have worn a bug costume) and the boulder would move, revealing a tunnel. The room was removed twice when the play was replaced with other plays.
- If five penguins stood on the five "O's", a treasure chest would open, revealing a Quartz Pin.
- This was the third room that is accessible through the Stage, the first being the Plaza and the second being the Backstage.