Introducing Sublevel Zero, a first person 6DOF roguelike shooter from Sigtrap Games.
Expect a relentless assault with this game, as you pilot a lone gunship through procedurally generated undergounds levels, solving puzzles, blowing stuff up, and finding ancient artifacts.
The devs cite Descent, Forsaken, and Teleglitch as inspiration, and true to form to the difficulty of those games, the ammo is limited and you only get one life, without saves.
You can watch a trailer for the game below.
Sublevel Zero is coming summer 2015 to Steam for Windows, Mac, and Linux. You can go to their Steam page here.