19 chapters of fighting through top-secret labs, running atop harsh desert landscapes, sneaking into abandoned railways, and leaping across dimensions.A completely reimagined and refined single player campaign, including all new and expanded Xen levels.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. Single Player CampaignYou are Gordon Freeman, a theoretical physicist at the Black Mesa Research Facility. There has never been a better time to pick up the crowbar and play! About This Game Relive Half-Life Black Mesa is the fan-made reimagining of Valve Software’s Half-Life.īlack Mesa: Definitive EditionUpdate 1.5 brings together all the improvements to graphics and gameplay across 15 years of development to create the final version of Black Mesa.