The cheapest graphics card you can play it on is an NVIDIA GeForce GT 520. In terms of game file size, you will need at least 6 GB of free disk space available. An Intel Core 2 Duo E4400 CPU is required at a minimum to run NOKBAK. NOKBAK system requirements state that you will need at least 4 GB of RAM.
NOKBAK will run on PC system with Win 7 x32 and upwards.
