Commander Keen in "Invasion of the Vorticons"

Episode One: Marooned on Mars

Billy Blaze, eight year-old genius, working diligently in his backyard clubhouse, has created an interstellar starship from old soup cans, rubber cement, and plastic tubing. While his folks are out on the town and the babysitter has fallen asleep, Billy travels into his backyard workshop, dons his brother's football helmet, and transforms into...Commander Keen: Defender of Earth!  In his ship, the Bean-with-Bacon Megarocket, Keen dispenses galactic justice with an iron hand!

In this episode, which is the shareware episode of "Invasion of the Vorticons" and the first smooth-scrolling PC game ever, aliens from the planet Vorticon VI find out about the eight-year-old genius and plan his destruction. While Keen is out exploring the mountains of Mars, the Vorticons steal vital parts of his ship and take them to distant Martian cities! Can Keen recover all the pieces of his ship and repel the Vorticon invasion? Will he make it back before his parents get home? Play "Marooned on Mars" and find out!

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Approaching a Martian City   Shooting a Vicious Garg   Exploring Mars