Operation: Black Mesa

Half-Life: Opposing Force puts you in the role of US Marine Corporal Adrian Shephard, sent to contain the Black Mesa disaster. Experience the iconic Black Mesa facility from a fresh perspective with new weapons, enemies, and a compelling storyline.

✦ Best for half‑life fans craving a new story angle

Barney Calhoun rides a train into the Black Mesa research facility, only to be thrust into chaos when a resonance cascade tears the complex apart. \nThe expansion follows Calhoun’s desperate trek to rescue Dr.

✦ Best for half-life fans

Step into the shoes of Gordon Freeman in this faithful re‑imagining of Valve’s classic sci‑fi shooter, rebuilt on the Source engine.

✦ Best for half‑life veterans craving a faithful modern remake

Half-Life: Source brings Valve's iconic 1998 first‑person shooter to the modern Source engine, delivering enhanced lighting, realistic water, and ragdoll physics while preserving the original story.

✦ Best for nostalgic fps fans wanting classic story with modern physics

Half-Life: Decay is the third expansion to Valve's iconic first‑person shooter, released exclusively for the PlayStation 2 in November 2001.

✦ Best for players craving split-screen co-op in a classic half-life story