Level 40 : Cattywampusman07, Alway, MaxCommonXD. : Free Download

Article from the Backrooms Wikia about the level known as Level 40 by Cattywampusman07, Alway and MaxCommonXD.

CDK 003] Forever Nintendo : Mr. Kitty & Eric Chiptune : Free Download, Borrow, and Streaming : Internet Archive

Level 40 Video Rental Store [Backrooms Fandom]

Interval Pack Levels (31-60), Flow Free Wiki

[CDK 003] Forever Nintendo : Mr. Kitty & Eric Chiptune : Free Download, Borrow, and Streaming : Internet Archive

October 31, 2022, Cartoon Network/Adult Swim Archives Wiki

Worm Pack Levels (1-30), Flow Free Wiki

Interval Pack Levels (31-60), Flow Free Wiki

Dreamaniac - Club Extinction [Pop Quiz 072] September 14 2012 : Jon Vaughn : Free Download, Borrow, and Streaming : Internet Archive

Worm Pack Levels (1-30), Flow Free Wiki