Desura is a digital distribution app created by the Mod DB, which allows you to buy, install and play games with one click. So if you want to play Mayhem Intergalactic and other great games like it, we recommend you give Desura a try, it is free to use and makes buying and installing games simple.Mayhem Intergalactic Windows You need 30mb hard disk space and 27mb download to install this game. Mayhem Intergalactic Demo Windows Free playable demo. Play unlimited Quick Start singleplayer games, and get small taste of multiplayer. You need 30mb hard disk space and 27mb download to install this game.