A well made colony building game that requires strategic decisions. You can play the game with your basic highschool level science knowledge. Also this game is nearly a perfect simulation of real life engineering. Even though there are some made up mechanics, these mechanichs are not hard to learn nor unamusing. The only problem is, when you try to automate some of the basic needs like cleaning the water (i mean cleaning them from germs) requires some high level (and hard to make without a tutorial) game experience.