Commander Keen in Invasion of the Vorticons: Marooned on Mars

In "Commander Keen in Invasion of the Vorticons: Marooned on Mars," players take on the role of eight-year-old genius Billy Blaze, who becomes Commander Keen to defend Earth. After learning of the planet's danger, Commander Keen dons a football helmet and his homemade spaceship for an interstellar mission. This side-scrolling action game marks the debut of id's groundbreaking technology and the start of Commander Keen's epic adventures.