Editing Half-Life (video game) (section)

== Plot ==
At the underground [[Black Mesa Research Facility]], physicist [[Gordon Freeman]] participates in an experiment on a crystal of unknown origin. This triggers a [[resonance cascade]], which causes widespread damage and teleports in hostile alien creatures. Venturing to the surface, Freeman discovers government soldiers have been dispatched to [[cover-up|cover up]] the incident by killing humans and aliens alike. He is instructed by a scientist to make his way to the Lambda Complex to stop the alien invasion. 

Freeman kills a giant creature inside a rocket engine test facility. He uses an underground monorail to reach a rocket silo, where he launches a satellite to help the Lambda team. Freeman is captured by soldiers and left for dead inside a trash compactor. Escaping through a [[waste treatment]] complex, he discovers a laboratory filled with alien specimens, collected long before the resonance cascade.

Overpowered by the aliens, the soldiers begin to withdraw. Freeman fights across a military base to reach the Lambda Complex, where he discovers secret teleportation technology. There, scientists inform him that a powerful alien creature is preventing them from closing the portal. They teleport him to the alien dimension of [[Half-Life (series)#Setting|Xen]] to kill it.

Freeman encounters dead scientists who teleported there before him. He kills a large alien, the Gonarch, and finds a factory that manufactures alien soldiers. Finally, he discovers the Nihilanth's lair and kills it. Freeman is detained by the [[Characters of the Half-Life series#G-Man|G-Man]], a mysterious interdimensional agent who claims his "employers" wish to hire him. If he accepts, Freeman is placed into [[Stasis (fiction)|stasis]]; if not, he is teleported to his death.