Equipped with a football helmet, a pogo stick, and a neural stunner, eight-year-old Billy Blaze boards a giant alien space station in Commander Keen 5: The Armageddon Machine to prevent the destruction of the galaxy.
High jumps and instant death defined early side-scrollers
Every level in this 1991 platformer hinges on a single design choice: Billy Blaze moves with high momentum, high jump height, and zero room for error. Touch a single enemy, misjudge a drop into a hazard pit, or graze an energy beam, and you instantly lose a life. There are no mid-level checkpoints to save you, forcing you to learn level layouts by memory or rely constantly on manual saves from the main menu.
Movement feels nimble once you get used to the gravity, but mastering the pogo stick is mandatory to survive. Bouncing gives you massive vertical gain to reach high platforms and grab ledges, but it also makes fine control tricky when navigating tight corridors filled with hazards. You are constantly balancing speed against precision while managing your limited ammo for the neural stunner.
In Commander Keen 5: The Armageddon Machine, destruction is a structural puzzle
Instead of merely reaching an exit door, your central goal inside the massive Omegamatic space station is to disable the Quantum Explosion Dynamo. The top-down hub map lets you choose your path through various sectors of the ship, but four specific security machines defend the elevator leading to the final core. Destroying those targets requires exploring hazardous technical complexes, including:
- The Ion Ventilation System, where narrow air shafts limit your room to maneuver.
- The Energy Flow Systems, packed with timed electrical traps and vertical platform sequences.
- The Gravitational Damping Hub, forcing careful jumps across moving platforms.
- Four distinct Defence Tunnels (Vlook, Teln, Sorra, and Burrh) that block access to critical sectors.
Unlocking locked doors along the way requires hunting down specific keycards and colorful gems scattered across each stage. Along with security items, stages are packed with point pickups and jars of Vitalin. Collecting 100 jars grants an extra life, while rare Kegs O' Vitalin award an immediate free try, which you will need when pushing through the game on higher difficulty settings.
Terrifying enemies and strict ammo limits
The enemies onboard the Omegamatic force you to adapt your strategy on the fly. Basic alien threats like the floating Shikadi and their more aggressive Master Shikadi variants require quick timing to stun. However, no enemy instills panic quite like Robo Red. This giant, heavily armored red robot cannot be stunned or destroyed by your raygun, firing deadly red laser bursts the moment you step into its line of sight.
Running into Robo Red turns the game into an exercise in stealth and fast evasion. You have to bait its pathing, wait for a gap in its patrol, and pogo over its head before it unleashes a barrage. Because stunner ammo is limited and scattered in fixed spots across levels, wasting shots on unkillable targets or missing fast-moving flyers quickly leaves you helpless in the lower decks.
How id Software built a classic on MS-DOS hardware
Designed by Tom Hall and coded by John Carmack, John Romero, and Jason Blochowiak, the game was part of the Goodbye, Galaxy! release through Apogee Software, Ltd.. Using the custom 2D smooth-scrolling engine originally prototyped in Keen Dreams, id Software, Inc. achieved fluid screen transitions on standard PC graphics cards that matched the feel of console platformers from the same period.
Tom Hall famously considered this episode his personal favorite of the series, thanks to its dense level design and slick sci-fi aesthetic. Composer Robert Prince provided the soundtrack, though game files hide a piece of trivia: an unused track titled "Rock Me, But Don't Stone Me!" sits in the game code, left out because the team ran out of levels to place it in. Digging into the debug codes reveals leftover text for level 15, noting that Billy "unexplainedly finds himself by the High Scores."
Play Commander Keen 5: The Armageddon Machine online for free
While the one-hit deaths and lack of automated checkpoints can feel tough, the tight controls, clever stage layouts, and expressive 16-color EGA artwork hold everything together. If you enjoy classic PC platformers, this adventure still gives you plenty of reasons to play.
You can play Commander Keen 5: The Armageddon Machine free in your browser right here, with full keyboard support and no setup required. Modern players often forget how fast Billy falls when misjudging a ledge grab, so practice your bounce timing on the opening map before charging headfirst into Robo Red's line of fire.