An Intel Core 2 Duo E8400 CPU is required at a minimum to run SpaceMerc. You will need at least 378 MB of free disk space to install SpaceMerc. SpaceMerc system requirements state that you will need at least 512 MB of RAM. Provided that you have at least an NVIDIA GeForce 510 graphics card you can play the game.
SpaceMerc will run on PC system with XP or greater and upwards. Additionally it has a Linux version.