addition to the campus grounds, the Xavier Institute also houses an array of
restricted access Sub-Levels. The Danger Room, War Room, Hangar Bay, holding
cells, research and development labs, medical labs and Cerebra chamber can all
be found in the sub-levels.
Voice-activated hallway icons give interactive directions through the
sub-levels, though these are restricted to the sub-levels.
Access to the sub-levels is only available to faculty, X-Men, and students --
although students are only granted access once they have spoken to their squad
leader or faculty advisor.
To access the sub-levels you must go to the hyperlift at the end of the hallway
in the foyer, then proceed through the various security measures such as hand
scans, retina scans, voice scans and passcodes.