Survive and colonize on an unknown planet near a red star. Find and gather resource, build shelter and engineering factory, avoid alien invasion, and finally build/maintain working ecosystem on the planet. Whole game goes within a single persistent simulator in the server that will be reset periodically with some game rule/setting changes. In short: massively multiplayer planetary colonization game.
You can dig and make slopes on the terrain. People and things can slide down the slopes(transport with lower cost) .