The cheapest graphics card you can play it on is an NVIDIA GeForce GTX 560. Space Shaft system requirements state that you will need at least 4 GB of RAM. In terms of game file size, you will need at least 3 GB of free disk space available. To play Space Shaft you will need a minimum CPU equivalent to an Intel Core i3-530.
Space Shaft will run on PC system with windows 7, 8 or 10 and upwards.