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 Xenonauts 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.Xenonauts Premium Alpha Windows Linux Mac This is the Premium pre-order of Xenonauts. This will grant access to the development builds of the game to allow you to beta test the game, plus a copy of the final game once it is complete on Desura or Steam, plus Goldhawk Interactive forum goodies! You need 4.6gb hard disk space and 4.4gb download to install this game. Xenonauts Alpha Windows Linux Mac This is the standard pre-order version of Xenonauts. Purchasing this will give you access to the latest Xenonauts development builds, and a copy of the final game once released on Desura or Steam. You need 4.6gb hard disk space and 4.4gb download to install this game.