In terms of game file size, you will need at least 1 GB of free disk space available. The minimum memory requirement for Radiant One is 2 GB of RAM installed in your computer. The cheapest graphics card you can play it on is an AMD Radeon HD 6450. To play Radiant One you will need a minimum CPU equivalent to an AMD Athlon II X2 245.
Radiant One will run on PC system with Windows 7 and up and upwards. Additionally it has a Mac version.