The Source-engine based remake of the original Half-Life has finally arrived. Black Mesa Source began development in 2004 as a fan-made reworking of the original classic by Valve Software and had been dubbed vaporware many times over the course of its life.

Now, anyone with a PC and a copy of the free Source SDK (downloadable from Steam) can play most of the game for free, reports The Verge. I’ve been waiting for this thing for a very long time, so I’m pretty excited. The team has reproduced the entire narrative up to Lambda core with new voice acting, animations and all kinds of fun stuff, it’s basically a complete remake, not just a visual one.

Screen Shot 2012 09 14 at 9.58.13 AM 520x298 8 years in the making: Half Life 1 remake Black Mesa Source is here

The project will continue as they reproduce the rest of the episode including the Xen sequences. They’ve said, though, that Xen will be almost a complete game in and of itself, with greatly expanded content. So there’s that to look forward to.

The Black Mesa Source site has several download mirrors available.