To your right the toilets contain a zombie and a headcrab. Further
along the corridor is blocked by a rockfall which forces you to head
left through into a lab area.
In the first lab room there are several zombies which you can take out from
a distance. The broken glass case contains more headcrabs which will
jump out if you get too close.
The small corridor leading from this lab takes you to the mini-gate chamber.
This contains a small-scale gate device which when active will open a small portal that
allows Xen lifeforms to enter our dimension. A case on the left holds an egon cannon
but the glass front of this case can only be cracked by the gate device being over-loaded.
Watch out for alien slaves teleporting in when you go into this room. When you've
dealt with them you can activate the gate devicee using the switch on the right-hand
end of the gate machinery.
When the gate is active headcrabs will occasionally slip through the gate. You
need to deactivate the gate by causing the system to overload. Do this by pressing the
two buttons on the pedestals on each side of the gate. When the second button is
pressed the system will shut down completely. Beams from the gate device will crack the
glass front of the egon gun case.
To get to the gun you'll need to smash away some of the glass. Move fast because the
case inerior is radioactive and it will leak slightly when the glass is broken.
You can now exit the gate chamber and head along the curving corridor towards and office
area. Watch out for the bull squid at the entrance to the offices, and there's
a tripmine on the side of an office chair which you should avoid disturbing when
exploring the office area.
Leading on from the office area is a corridor with a couple of doors. The left-hand door
leads into a small storeroom and the right hand door into a medical lab.
The med lab contains some health and a battery but to get them you'll need
to tackle a number of headcrabs.
Following the corridor around leads to a final lab where a number of zombies are
fighting a squad of grunts. You may want to let them fight it out before going
When you come out of the lab you enter a split-level hallway area with a spiral staircase
leading to the upper level. On the lower level there's a health-charger in the little
section of corridor on the right (the other end of the rockfall-blocked corridor you passed
earlier), but watch out for survivors of the zombie/grunt fight when you go in.
The doors at the end of the hallway lead into a large study/office. There are
houndeyes here so be careful.
The top of the spiral stairs are booby-trapped by a tripmine which you'll need to
take out from the lower level. In addition, there are grunts and a sentry gun lying
in ambush on the upper level.
Once you make it past this defence go through the doorway on the upper level into a corridor.
Follow the corridor round and you pass into the next map.