Subspace Zone
From Transformers Wiki
The Subspace Zone (亜空間地帯 Akūkan Chitai) is mechanical path, presumably in space.
Games
Transformers: Mystery of Convoy
As the fourth part of his journey, Ultra Magnus crossed the Subspace Zone, battling Thrust and Laserbeak. At the end, Magnus entered a mechanical chamber where he battled and defeated the Destron Boat. Transformers: Mystery of Convoy
