Play Commander Keen 1: Marooned on Mars Online – MS-DOS Game

Game Overview

Commander Keen 1: Marooned on Mars is a classic MS-DOS platformer that launched the beloved Commander Keen series in 1990. Players take on the role of Billy Blaze, an eight-year-old prodigy who builds a makeshift rocket and lands on Mars, only to find critical parts of his ship stolen by the alien Vorticons. The goal is simple but engaging: explore Martian cities across side-scrolling levels, recover the missing components, and avoid deadly hazards like hostile creatures and bottomless pits. Keen’s trusty raygun and pogo stick—which enables high jumps—add variety to the gameplay, while keycards and bonus items encourage thorough exploration.

Notable for its colorful visuals, tight controls, and clever level design, Marooned on Mars helped establish the PC as a viable platform for action games in the early '90s. The overworld map, which lets players choose their next stage, was a fresh take on progression for its time. Though challenging, the game’s charm and creativity made it a standout title, paving the way for a successful series and solidifying its place in gaming history.
Each game uses different controls, most DOS games use the keyboard arrows. Some will use the mouse , "Alt" ,"Enter" and "Space bar".