Fly at least one Kerbal to the surface of the Mun, plant a flag, and bring them safely back to Kerbin for the lowest possible cost. (Following on from the discussion on this thread)   There are 3 categories: (1) Command chair...for the stingiest of space programs! Score is based on the VAB/SPH cost. (2) Pods...feeling slightly more luxurious. Score is based on the VAB/SPH cost. (3) Re-usable. The recovered value of your craft (the value reported in "Mission Summary"