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The room itself has been fitted with mounted weapons which are powered by Xen energy crystals. The Gene Worm is found deep underground in a seemingly abandoned industrial area of Black Mesa and appears through a portal opening powered by Sprites in a room there, apparently either unwilling or unable to fully enter this world, most likely because of the minuscule size of the portal behind it in proportion to the Gene Worm's presumably immense size and length. When the creature is idle and no threat is visible, it will gently sway its tentacles around, and emit soft hissing and groaning noises. When the Gene Worm 'dies', it sinks back into its portal, but not before emitting a 'portal storm' into the room, similar to the one that occurred as the Nihilanth died. The worm's weakness is by firing any gun at the rear of this stomach cavity It should be noted that the portal orb itself is not vulnerable to attacks. This causes it to summon reinforcements by opening its abdominal cavity to reveal a portal orb that a Shock Trooper will teleport through. Its outer hide is impervious to damage in order to kill it, the player must blind the creature by shooting both its eyes with the mounted laser guns on either side of the worm. The Gene Worm attacks with its tentacles and ejects a deadly chemical stream from its mouth. Physically, the creature resembles a green, worm-like creature with many tentacles and a beak-like protrusion similar in both shape and position to that of the XenTentacle. If one fully entered Earth and became productive, it would effectively alter the planet enough to become useful as a new homeworld for Race X. This life form is the equivalent of a 'biological resource management factory.' It is capable of taking any of Earth's natural resources and assimilating it to make them useful to the aliens' needs. The Gene Worm is the final boss of Half-Life: Opposing Force, and the most mysterious of the Race X aliens.
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Opposing Force was the first expansion for Half-Life and was announced in April 1999.
HALF LIFE OPPOSING FORCE LAST BOSS SOFTWARE
Half-Life: Opposing Force is an expansion pack for the first-person shooter game Half-Life.The game was developed by Gearbox Software and Valve and published by Sierra On-Line for Windows on November 19, 1999. This life form is said to be the equivalent of a 'biological resource management factory.' It is suspected to be capable of taking any of Earth's natural resources and assimilating it to make them useful to the aliens' needs. This life form is the equivalent of a 'biological resource management factory.' It's capable of taking any of Earth's natural resources and assimilating it to make them useful to the aliens' needs. From Combine OverWiki, the original Half-Life wiki and Portal wiki
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