The event will run until 1 November.
Valve are not traditionally announces framework for major seasonal sales in advance. However, the date following the sale appeared online in advance.
A thematic sale traditionally expose horror game with a mystical storyline and involved characters such as zombies, ghosts or evil spirits. The event will run until 1 November. Then, according to tradition, will launch on Steam autumn sale, which is expected in November. And then gamers waiting for the latest in 2016 a holiday winter sale.
And while Steam users are spoiled by the weekly sales for the weekend. This week Bethesda Softworks company sells games the Fallout series with a 50% discount. Polish Studio CD Projekt also sells game series The Witcher.