In order for you to play GRAV on Windows with minimal graphics settings, your computer must meet the following requirements
Operating System:
7 64-bit
Processor (CPU):
Intel Core 2 Duo 2 GHz or Equivalent CPU
Memory (RAM):
8 GB RAM
Graphics Card:
GeForce GTX 560 or Radeon HD 7790 or Equivalent card
DirectX:
Version 9.0c
Storage:
5 GB available space
In order to play GRAV on Windows with maximum graphics settings, you need a computer with a configuration no worse than the following
Operating System:
7 64-bit
Processor (CPU):
Intel i5 2.5 GHz or Equivalent CPU
Memory (RAM):
8 GB RAM
Graphics Card:
GeForce GTX 760 or Radeon HD 7950 / R9 280 or Equivalent card
DirectX:
Version 9.0c
Storage:
5 GB available space