I have never met its match in crafting games. This game is about the pure joy of creation and the power of engineering, alone or with friends (or enemies). You can build massive space stations attached to asteroids in space or on the surface of a planet or tucked deep into the core of one. You can build machines to mine ore in all those places, to defend against pirates, to warp between areas, to trade with NPC space and ground-based stations or other players, to joy ride on a low gravity world, or practically anything else you can imagine. And if you know some C# you can script programmable blocks that allow you to do much more: automate tasks, manage resources, coordinate defense, control drones to scout for resources, and much more. It has a set of simple physics blocks like pistons and rotors that can attach to stations and ships as well.
My favorite moment in the game was building a space station with security doors, restricting access between military and civilians. It had a full system of dynamic economy, automatically adjusting the prices of materials based on the current supply. It fully automated the stocking of created tools and weapons. It even had a simple video arcade for pilots to relax and pass the time while recharging their batteries from the station's solar array. It had a compliment of carrier ships that could house smaller resource miners and small fighter ships that could be operated remotely.
You could sit in the command center and monitor security cameras, and deploy or stow retractable missile launchers that automatically assembled and fired smart missiles that shared and coordinated target information.
And that doesn't even begin to cover the fun of raiding NPC bases or massive battles with other players. Crashing a war ship into an enemy base and watching both crumble into heaps of rubble, or fly away with massive sections gone, having lost the front thrusters that would slow it down.
I love this game so much!