Anarchy Enterprises and BigFish Games have released a real time strategy game called Moon Tycoon (download free trial here). This good-sized program (35MB+) looks like it is a re-release of an earlier box CD game from 2003.
Moon Tycoon is a typical SimCity-like game where the user constructs a lunar base of 50 types of buildings, attempts to create an economy through mining and other activities, and then has to survive the inevitable disasters that strike. This is a complex game whose tutorial alone will take up the free 60 minutes of the trial. It is a rich graphical game, with a cool 3D interface, including a wonderful camera control system, and it has a deep electronic-like soundtrack. There are a lot of gameplay options, including 3 story-based campaigns, but it is not a lightweight gaming experience - it feels very much like a traditional PC Sim game.
Verdict: Moon Tycoon is a 3D PC simulation game - not appropriate for most casual gamers unless looking for a slower strategy experience.
Fish Tycoon - see review here