Space engineers a 6.89€ sur indigala ,sand box de construction spaciale avec planète a explorer/exploiter, astéroide etc etc ... multi avec possibilité de créer un serveur.
https://www.indiegala.com/store/product/space-engineers/244850
http://store.steampowered.com/app/244850/
https://www.indiegala.com/store/product/space-engineers/244850
http://store.steampowered.com/app/244850/