Commander Keen is the beginning of an epic adventure about Commander Keen, who 8-year-old Bill Blaze imagines himself to be. The boy's alter ego wakes up after he learns that Earth is under threat from an alien invasion. The young genius decides to save his home planet, so he puts on his brother's helmet and builds an interstellar ship from old junk in the backyard. As soon as the family goes to bed, the eight-year-old genius climbs into his ship, turns into Commander Keen and sets off on a risky journey.Bill, in the Commander's body, travels to different planets inhabited by space worms, slugs, etc. d. The imagination of the hero of the game Commander Keen draws unimaginable dangers and battles with numerous wandering monsters. Keen has a lot of robots: he moves from one floating platform to another, loves to jump on a jump rope, presses levers, flies over chasms, solves secrets. The hero has a super blaster. This laser pistol is capable of killing any alien with the first shot. The guy is able to calm down all the monsters in the Universe, well, who else will save the Earth if not him?Bill declared the following rules:
- The hero himself chooses the direction in which he will teleport.
- A jump with the help of a pogo on the enemy's head completely disables him.
- It is necessary to constantly collect scattered parts of the spaceship, cans of cola and other things necessary for returning.