MAP31: Optical Hopscotch (BTSX: Episode 1)

Optical Hopscotch is the secret mission of the officially-supported DooM II mod BTSX: Episode 1, designed by skillsaw. It is the 26th mission overall, but takes up the map slot 31. Its name was changed to Defenestrator in the official release for no apparent reason. Although it does not display a par time, it is defined as 4:45 in the MAPINFO. It is entered from MAP15: Tricyclic Looper (called Tesselation Cycle in the official release) and exits to the super secret level MAP32: The Hard Way (called The Terror of Maniac High in the official release).