The cheapest graphics card you can play it on is an NVIDIA GeForce 6100. You will need at least 100 MB of free disk space to install LO-OP. An Intel Core 2 Duo U7600 CPU is required at a minimum to run LO-OP. The minimum memory requirement for LO-OP is 512 MB of RAM installed in your computer.
LO-OP will run on PC system with Windows 7 and upwards. Additionally it has a Linux version.