You will need at least 50 MB of free disk space to install J.A.C.K.. To play J.A.C.K. you will need a minimum CPU equivalent to an Intel Pentium 4 2.00GHz. The minimum memory requirement for J.A.C.K. is 1 GB of RAM installed in your computer. Additionally, the game developers recommend somewhere around 2 GB of RAM in your system. Provided that you have at least an NVIDIA GeForce 6200 graphics card you can play the game. But, according to the developers the recommended graphics card is an NVIDIA GeForce 7200 GS.
J.A.C.K. will run on PC system with Windows XP SP3 or newer and upwards. Additionally it has a Linux version.