Continue Thomas Foster's journey to finding a missing psychopath.
Pre-purchases for the Windows, Linux, and OS X version of Doorways: The Underworld, which is also known as "Doorways: Chapter 3," is on sale for $7.49 (25 percent off) on Steam until September 17, 2014, at 1:59 PST.
Doorways: Chapter 1 & 2 is also on sale. You can download both of those chapters for $4.99 (50 percent off) until September 22, 2014.
It's worth noting that Doorways: The Underworld is a standalone title that doesn't require Doorways: Chapter 1 & 2 to play.
Other horror titles that's on sale on Steam until September 22, 2014, includes Nosferatu: The Wrath of Malachi and Left 4 Dead 2.