Well, that is where Mothership Zeta starts, but if it is the regular game, there is an Alien, his blaster and 140 ammo. (14 Alien Powercells)
So it's just like a clue and then Mothership Zeta is like an explanation.
Imo, the mothership thing ruins the feel for apocalypse.
Also in the pipes when you were escaping from clearing the pipes, that scared the forget out of me because both grates were locked and it was noisy and I was expecting some stuff to come flying out and kill me. D:
This game is an obsession.