Into the Back Rooms and Secret Ending

Will: The design goal of this region was to create a maze of conduits that connect all of Five Pebble's machinery.

Will: Of course, Five Pebbles has organic components as well, but most are hidden from view.

Will: Not here, we're beyond maintenance tunnels and inside the actual guts of the facility!
Being chased through tight confusing tunnels by corruption as it spreads through Five Pebbles'
body. The rot having torn open paths into these pipes as it corrupts him.

Will: The unsettling nature of this place even made it into a sort of secret ending for Rivulet, if you steal Five Pebble's music pearl.