Plummeting through subterranean foundations

Passing over deadly pools of waste

The gears in motion operating Black Mesa

Showing decay, barely held into place

Within the lab of materials anomalous

I don the armor, shielded from hazards

In the test chamber with the anti-mass spectrometer

Standard procedure for a specimen non-standard

Behold creation of the resonance cascade

Glimpses of a distant world render me dismayed

I awake in the ruins of the cataclysm

As vicious creatures claw their way into the base

In an attempt to escape the devastation

Begin to make my way up to the surface

Out of reach but ever present overseer

Observing every single step of my progress

Shifting through the corridors and narrow chambers

Fend off invaders flooding through the rift

In an attempt to conceal this disaster

So called rescue teams slaughter my companions

I must obstruct the dimensional breach

Overwhelmed by enemies my destination slightly out of reach

Into the blast pit I descend

Titanic tentacles sprouting from the depths

Fire the engine to incinerate the Hypersuctor beast

Dig through the burrows down below

In Sector E the gargantua wreaks havoc

Bludgeoning everything that stands in its way

Activation of the generator power

Surges the beast with the deadly electric waves

Captured by the enlisted slaughter lords

They leave me to my death to be crushed by compactors

With swiftness I escape their fatal clutches

Continue this mission and defy foolish captors

Secrets found in the confines confidential

Border world specimens contained in canisters

Face to face with extraterrestrial behemoths

Particles flare from the blast of the tau cannon

Surface tension rises, tides begin to turn

Imminent defeat crushes reinforcements one by one

Return to cover underground

Missions abandoned by the soldiers of the earth

Decimated forces laid to waste at every turn

I must now reach the Lambda Core

Open the portal to the mystic border world

Deadly yet intrinsic, controlled by an overwhelming force

Battle through the Gonarch's lair

Onward to the cloning base creating legions pouring out of Xen

The Nihilanth taunts me as I approach the throne room steps

Destroy the healing system, detonate its cranium

Time stands still, the overseer approaches

Offers of pursuits unknown or battles I will lose, it's time to choose