Relik system requirements state that you will need at least 8 GB of RAM. You will need at least 200 MB of free disk space to install Relik. The cheapest graphics card you can play it on is an NVIDIA GeForce 8200M G. An Intel Core 2 Quad Q6600 CPU is required at a minimum to run Relik.
Relik will run on PC system with Windows 7 (64-Bit) and upwards. Additionally it has a Mac version.