The Tunnelers, were Morlocks who hated Callisto's main group and dubbed them Drain Dwellers. Initially a group of ten, six of the Tunnelers were killed when the Marauders were sent to kill the Morlocks. The casualties included Cybelle who was slain by Harpoon. She managed to warn the Morlocks leader, Callisto, before she was killed. The four others survived the attack, only to get in another battle with Beast and Iceman, thinking they were Marauders too. The battle ended when the Tunnelers figured out that the X-Factor members were not their enemies.
Joining X-Factor at their base, the Tunnelers found out about their hosts' mock mutant hunter identities. The Tunnelers eventually left hoping to find a new home in New Jersey. They ran into a human street gang called the Savage Wolf gang who tried to rob them. The Tunnelers fought back, ending in the deaths of Blowhard and two of the three gang members and the wounding of Masque. Blowhard was shot through the chest by a member of the Savage Wolf gang.