Black Mesa

Heavily updated single player experience – The Black Mesa single player experience has greatly improved from the mod release; new visuals, new voice over, updated gameplay encounters, stability changes and more. Xen is not part of the Steam release of Black Mesa, but will included as a free update when it is ready.

Black Mesa Multiplayer – Fight with or against your friends, in two game modes across six iconic maps from the Half-Life Deathmatch universe: Bounce, Gasworks, Lambdabunker, Stalkyard, Subtransit and Undertow.

Custom Modding Tools – Use the same tools the developers used to create your own mods, modes and maps for Black Mesa and Black Mesa Multiplayer …

Fully integrated Workshop – … and then share your work on the fully integrated workshop!

Complete Steam Integration – Collect trading cards, backgrounds, emoticons, achievements, and everything else you would expect out of a Steam integrated game.