Moonfall system requirements state that you will need at least 2 GB of RAM. You will need at least 1 GB of free disk space to install Moonfall. To play Moonfall you will need a minimum CPU equivalent to an Intel Pentium 4 2.00GHz. The cheapest graphics card you can play it on is an Intel HD 3000.
Moonfall will run on PC system with Windows XP/Vista/7/8/10 and upwards. Additionally it has a Linux version.