Half-Life

There is a version of Black Mesa that only ever existed on Sony's console. Decay, the two-player campaign Gearbox Software bolted onto this 2001 conversion, hands you Gina Cross and Colette Green, two of Dr. Keller's research assistants working the same catastrophe from a different angle. It is split-screen, it is genuinely cooperative in places, and it never appeared on PC in any official form. For a port that arrived three years after the original, that is a more serious offering than the era's console conversions usually managed.

The main campaign is the 1998 game, largely intact, and it survives the transfer better than you would expect. The design still refuses to break for cutscenes: the tram ride, the resonance cascade, the slow crawl up out of the facility all happen while you hold the controller. Level geometry does the storytelling, and the marines who arrive to clean up after you are still one of the best mid-game reversals in the genre. Gearbox rebuilt character models and touched up lighting, which flatters the scientists and makes the Xen chapters look less like a texture experiment.

What does not transfer cleanly is aiming. Twin-stick shooter conventions were not settled in 2001, and the compromise here leans on generous auto-aim to keep the crowbar-and-shotgun rhythm workable. It mostly holds up in corridors. It fights you in the open, particularly against Xen fliers and the sniper sequences, where the analog stick's acceleration curve turns precision into a negotiation. Anyone coming from a mouse will find the first hour humbling in the wrong way.

The scientific-facility fiction is what dates least. Black Mesa is a workplace before it is a battlefield, and the game keeps insisting on that with break rooms, security guards who follow you around, and doors that need someone else's retina. That texture is what makes the shift into military occupation land, and no amount of resolution would improve it.

Decay remains the reason to seek this version out. It is short, it is uneven, and its puzzle-heavy structure asks two people to actually pay attention to each other rather than race ahead. But it is a piece of Half-Life's story that Valve never revisited, sitting on a console nobody expected to hold it.