FIST: MOONBASE MADNESS is a FIST mission about dealing with the consequences of the moon landing.
The PDF is 12 pages, with a clean, well-organized layout and a little bit of stock art.
Contents-wise, this scenario involves invading two moonbases, one of which is on earth. There are some simple traps and combat, as well as an interesting twist---plus the novel tactical environment of fighting on the moon---and the module in general feels like a good campaign start or an introduction for beginners.
Overall, MOONBASE MADNESS is a solid FIST mission, well designed and written, that should fit easily into most FIST games.