Wayback When-s-day Black Mesa: Somebody Miscalculated
4Relive Half-Life
Black Mesa is the fan-made reimagining of Valve Software’s Half-Life.
Black Mesa: Definitive Edition
Update 1.5 brings together all the improvements to graphics and gameplay across 15 years of development to create the final version of Black Mesa. There has never been a better time to pick up the crowbar and play!
Single Player Campaign
You are Gordon Freeman, a theoretical physicist at the Black Mesa Research Facility. When a routine experiment goes horribly wrong, you must fight your way through an interdimensional alien invasion, and a bloodthirsty military clean-up crew in order to save the science team... and the world!
Features
A completely reimagined and refined single player campaign, including all new and expanded Xen levels
19 chapters of fighting through top-secret labs, running atop harsh desert landscapes, sneaking into abandoned railways, and leaping across dimensions
Mind-Blowing graphics and effects, never before seen on the Source Engine
Face off against an army of classic enemies, updated with new features and engaging AI
Wield an arsenal of military hardware, scientific prototypes, and the iconic crowbar through incredibly detailed environments
The all-new soundtrack and voice acting create a more immersive experience than ever before
50 Fun and challenging achievements
Multiplayer
Frag your friends across 10 iconic maps from the Half-Life universe, including:
Bounce, Gasworks, Stalkyard, Undertow, Crossfire
Workshop
Create your own mods, models, and maps with the Black Mesa Source SDK, then share it with the community on the Steam Workshop.
Steamworks
Collect the full set of trading cards, backgrounds, emoticons, and achievements! Featuring Steam Cloud, Steam Workshop, closed captions in multiple languages and full controller support.
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MATURE CONTENT DESCRIPTION
The developers describe the content like this:
Violence and death due to falls, blunt force, gunshots, and explosions. Over the top dismemberment of NPCs (gibing) that some may see as realistic.