You have just come in and into your office. Something is off. Then a voice over the intercom tells everyone to evacuate the facility. Black Mesa is under attack. You grab your HEV suit and start running to get out as quickly as possible. (I am young and don't have much time on the mod) (DISCONTINUED)
The first level made by Me (Arkheo) and cool_cid. Drop the .bsp into you half-life/valve/maps then open half-life and type in console map Start.
Well, it's definitely a map. Not really much to be said about it. Lots of rooms with nothing much going on and one enemy to kill...