You can pre-order The Witness on Steam and Humble Store

Now you can pre-order on Steam and Humble Store The Witness, the new exciting puzzle adventure developed by Jonathan Blow (Number None). According to both portals, the game will be priced at £29.99 (€36.99). The game will cost the same on PS4 (PSN) as well. Below, you can take a look at the requirements (minimum and recommended) for the game on PC:

MINIMUM:
OS: Windows 7
Processor: 1.8GHz
Memory: 4 GB RAM
Graphics: Intel HD 4000 series
DirectX: Version 10
Storage: 4 GB available space

RECOMMENDED:
OS: Windows 7
Processor: 2.4GHz
Memory: 8 GB RAM
Graphics: GeForce 780
DirectX: Version 10
Storage: 4 GB available space

The Witness will be available starting from January 26 on PC and PS4.