The Talos Principle: Road to Gehenna (2015)

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.