Space Engineers is a sandbox game about engineering, construction and maintenance of space works. Players build space ships and space stations of various sizes and utilization (civil and military), pilot ships and perform asteroid mining.
Yesterday, Space Engineers was released on Steam in “Early Access” : http://store.steampowered.com/app/244850/
This game looks very promising and we will closely follow it in the future.
More informations about this game: Space Engineers on Sandbox-Games.net