Descent: Underground has shortened the title and has a beta date.
The shooter, now simply called Descent, will be available in November. The Descendent Studios project is a prequel to the 1995 game of the same name (since then).
The game was funded on Kickstarter in 2015 and was released to Steam Early Access at the same time. However, in September 2017, the game was removed from there, and there was no news from the developers for a year.
The beta version will be available to everyone who participated in the crowdfunding and tested the game in Early Access.
The full release of Descent is planned for early 2019.