The Tunnel Hub is a tech building that allows the owner's units to be transported to other Tunnel Entrances on the map instantly and acquire capability to use all other Tunnel Entrances automatically.
A Tunnel Hub and its entrances can have a maximum of 6 ground units at a time. Unlike vehicle transports, any ground unit, whether infantry or vehicle counts as 1 slot.
Vehicles that take more than 6 passenger slots normally (such as Armadillo and Borillo) and hover units cannot be ordered to enter the tunnel network.
Units inside the tunnel network cannot be harmed, but if the Tunnel Hub and its Entrances are all destroyed, all the units are lost as well.
- In Fallen Ashes, there is a Tunnel Hub stationed in the city. Capturing it will acquire all Tunnel Entrances on the map to the player.
- In Dance of Blood, the player has a Tunnel Hub in the main base, which can connect with the Tunnel Entrance on the other side of cliff.
- The Tunnel Hub and Tunnel Entrance works similar to and in and in to a lesser extent.