Nega's Asylum

A long-since abandoned nuclear submarine presently serves as a hidden refuge of sorts for Eggman Nega, who, in the event of his main plot(s) & main base becoming compromised, knew that he would need a place to go and begin operating his contingency plan. The asylum extends further into the earth, providing more space for control rooms and isolation tanks holding prisoners; additionally, the area is outfitted with Egg Pawns as security. It is known that one of the control rooms houses a large, glass compartment for experimentation—though currently, Nega's use for it remains a mystery.

Ultimately, both Eggman Nega and the Head Alien are forced to retreat here, to rendezvous with the rest of the alien horde and figure out their next plan of action for their "End Reality" Scheme (though in the Head Alien's case, he merely wants Spaceman Spiff destroyed); it does not take long, however, for Bill, Gaz, Frogger, Treeby, and Tank to arrive and begin infiltrating the asylum, battling the Egg Pawn security force along the way.

(editing shall recommence soon)