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Human astronauts have landed on Mars in their futuristic space shuttle in their quest to find energy crystals, but they have awakened evil aliens who want the crystals for themselves. The astronauts must defend their Martian base using the air-powered defense system. Turn the air pump to the right and transfer the aliens and energy crystals through the tunnels. Turn the air pump to the left and slam the pump to launch the foam missiles in defense. Includes command base, alien attack ship, futuristic space shuttle, air pump system, foam missiles, four astronaut minifigures and four alien minifigures that glow-in-the-dark. 763 pieces.
