An Intel Core 2 Duo T5600 CPU is required at a minimum to run SPACEPLAN. The cheapest graphics card you can play it on is an NVIDIA GeForce Go 7600. SPACEPLAN system requirements state that you will need at least 1 GB of RAM. You will need at least 250 MB of free disk space to install SPACEPLAN.
SPACEPLAN will run on PC system with Windows 7 or later and upwards. Additionally it has a Mac version.