In terms of game file size, you will need at least 512 MB of free disk space available. By contrast, the game developers recommend somewhere around 1 GB of free disk space on your system drive. The cheapest graphics card you can play it on is an NVIDIA GeForce 310M. To play Grey Zone you will need a minimum CPU equivalent to an AMD C-50. Whereas, an Intel Core i5-3330 is recommended in order to run it. Grey Zone system requirements state that you will need at least 1 GB of RAM. Additionally, the game developers recommend somewhere around 4 GB of RAM in your system.
Grey Zone will run on PC system with Windows XP SP3/7/8/10 -- 64-bit and upwards.