Good news, Half-Life fans – following Black Mesa‘s arrival “from beginning to end” in beta earlier this month, Crowbar Collective has another exciting announcement: the team has just issued a major patch to the game’s Xen levels meaning “Xen is out!” But that’s not all – Black Mesa has now been released in full on Steam as an Early Access game, and it’s currently on sale. As announced on the Black Mesa Steam community page, the Xen levels have now landed, following beta release in August this year. These recreate the original game’s Chapter 15, which sees you head to the Borderworld – alien planes where multiple dimensions intersect and you have to track down a teleporter which leads to Gonarch’s Lair. The original chapter was widely considered to be the least successful section of the otherwise game-changing Half-Life. Black Mesa has now been released in full on Steam in Early Access, which means players can dive into a “polished and tested” version of the whole game without having to jump over to public beta. The creators say: “If you have been holding out for Xen, this is what you have been waiting for!” And best of all, it’s currently got a 20% discount (at the time of writing) so if you’re keen to relive Gordon Freeman’s adventures in shiny new detail, now might be the time.