Epic Games currently has a Halloween sale on. There are discounts on several games, including but not limited to:
- Alan Wake
- The Sinking City
- Heavy Rain
- World War Z
And so on.
Link to the sale: Click Here.
Sale ends 1st November.
Edit
Also don’t forget that the Monster Mash sale on Humble Bundle, which is also for horror games (Steam, Origin, etc), ends in two days from this post. [Sale] "Monster Mash" sale. Several games on sale from 25% off up to 90% off. Expires 21st Oct