Space Engineers is a sandbox game about engineering, construction, exploration and survival in space and on planets. Players build space ships, space stations, planetary outposts of various sizes and uses (civil and military), pilot ships and travel through space to explore planets and gather resources to survive. Featuring both creative and survival modes, there is no limit to what can be built, utilized and explored. Space Engineers features a realistic, volumetric-based physics engine: everything in the game can be assembled, disassembled, damaged and destroyed. The game can be played either in single or multiplayer modes.
Early access review
If you want one of the best sandbox games and one of the best space simulators ever created, look no further than Space Engineers, even better than Kerbal Space Program. Minecraft in space with amazing graphics, better developers and an even more amazing community (+No little kids), the only thing I could ask for beyond this point is better optimization, but since it has improved dramatically since release I will let that slide because no I can not only run it, but I can run it with 100 FPS and that makes it even more amazing.