You will need at least 4 GB of free disk space to install Luna. The cheapest graphics card you can play it on is an AMD Radeon RX 460. Luna system requirements state that you will need at least 8 GB of RAM. To play Luna you will need a minimum CPU equivalent to an Intel Core i5-7200U. Whereas, an Intel Core i5-4590 is recommended in order to run it.
Luna will run on PC system with Windows 8.1 and upwards. Additionally it has a Linux version.
Minimum System Requirements
Recommended System Requirements
CPU
Intel Mac 2 GHz
RAM
1 GB RAM
OS
OS X version Leopard 10.5.8, Snow Leopard 10.6.3, or later