Hard to believe but true, Endarchy is finally finished. You can in fact download Endarchy, unzip it and play from start to finish.
In case that was not enough you even have a choice of download locations to pick from. OK, that is not too exciting :]. Endarchy plays as a mod of Doom 3, so you will need a full copy of Doom 3 to play. Be sure to have a fully patched version too.
Huge thanks to Mikko Määttä who has been beta testing on Fedora (Linux) and suggesting tweaks over the years.