New Road To Gehenna DLC is now available on Steam to bring more content to The Talos Principle, Croteam's Windows, Linux, and OS X first-person puzzle game which is currently on sale. Here's a launch trailer and here's word on where this road leads:

The Talos Principle: Road to Gehenna follows the narrative of Uriel, Elohim's messenger, as he explores a strange, hidden part of the simulation on a mission of mercy and redemption in an attempt to free the souls of the damned at all costs.

This substantial expansion consists of four episodes that take experienced players through some of the most advanced and challenging puzzles yet. The Talos Principle writers Tom Jubert and Jonas Kyratzes have returned to pen the expansion and show players an entirely different side of Elohim's world through a journey to Gehenna filled with new characters and a new society with its own history and philosophy.