Holy system recommendations, Batman! Bethesda has released their recommended PC system specs for The Evil Within and wow are they a head scratcher.
Recommended PC System Specifications
64-bit Windows 7/Windows 8
i7 with four plus cores
4 GBs RAM
50 GB of hard drive space*
GeForce GTX 670 or equivalent with 4GBs of VRAM
High Speed Internet Connection
Steam account and activation

*It’s worth noting that the 50 GB of space required is for the PC install. When the installation is complete, the game will take up ~41 GB of HDD space.

Alright, but what about the minimum requirements for the game?
We do not have a list of minimum requirements for the game. If you’re trying to play with a rig with settings below these requirements (you should plan to have 4 GBs of VRAM regardless), we cannot guarantee optimal performance.

Either this game will surpass the visual fidelity found only in the latest CryEngine releases or benchmark apps, or it's incredibly unoptimized for the PC. If nothing else, you can always get it for your favorite console. Just make sure you have some hard drive space available.
Xbox One — 40 GB HDD Space
PlayStation 4 — 40 GB HDD Space
PlayStation 3 — 7 GB HDD Space
Xbox 360 — 7 GB

The Evil Within is slated for release on October 14.