You will need at least 150 MB of free disk space to install Rubek. The cheapest graphics card you can play it on is an NVIDIA GeForce 6200. An Intel Core 2 Duo T7250 CPU is required at a minimum to run Rubek. Rubek system requirements state that you will need at least 2 GB of RAM.
Rubek will run on PC system with Windows XP/Vista/7/8 and upwards. Additionally it has a Mac version.