Portal: Maybe Black Mesa Map

Escape the Black Mesa reverse engineering department using the stolen aperture portal gun. It is not a learner's map or for beginners. Advanced techniques are definitely required to solve your way out of the facility.
Maybe Black Mesa By Sean M. hawdcoreweezer@yahoo.com Installation: extract contents into "steamappsusernameportalportal" directory and access the map via the bonus map menu. A bonus map taking place in the reverse engineering department of t