The cheapest graphics card you can play it on is an NVIDIA GeForce 6100. In terms of game file size, you will need at least 200 MB of free disk space available. The minimum memory requirement for ReX is 2 GB of RAM installed in your computer. To play ReX you will need a minimum CPU equivalent to an Intel Pentium 4 2.00GHz.
ReX will run on PC system with Windows 7, Windows 8, Windows 10 and upwards. Additionally it has a Mac version.