The Beta Den is the unofficial name for the unnamed den that was available by default for all Jammers during the Beta Testing. After the Beta Testing ended, the den was replaced by the Small House as the default den.
The den opened with a large bridge that connected to a two-story den and had a ladder connecting to the upper floor. It also had a basement, which was connected to the main floor by a stone staircase. The bridge outside would lead back to Jamaa Township.
- The Beta Party takes place in a modified version of this den that is filled with various beta-themed decorations.
- Although the den is unavailable on the game, the room file for the den still exists in the files.