Episode X

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Episode X
Episode X.png
Mod-ingame-Episode X.png
Modded episodeKeen 1
ProtagonistCommander Keen
Release date
Discussion(s)PCKF: development, release
Keen: Modding
Number of levels18
Secret levels0
New gameplay?No
New graphics?Yes
New levels?Yes
New sounds?No
New music?No
(5 votes)
Other mods in this seriesEpisode Y,
Episode Z,
Episode Null,
Episode Dash

Commander Keen Episode X aka. XkyKeen1 is a Keen 1 mod by Xkylyr Rauh. It's the second mod ever created for an original Commander Keen game. It won the 2002 Keen Awards.

It takes place aboard a spaceship. The story takes place after all the official Keen games, and is an interpretation of a possible storyline for Commander Keen: The Universe is Toast.


In this episode, having stopped the Shikadi Armageddon Machine and saved his babysitter Molly from being devoured by the Bloogs of Fribbulus Xax, Commander Keen finally sits down to decypher the mysterious message he found in the command room of the Q.E.D.

Upon translating, Keen was shocked to discover that Mortimer's plans extended far beyond the destruction of Earth--or even the Galaxy! No, Mortimer's plan is to destroy the Universe!

Checking in on his still-groggy parents, (whom he had recently nursed back to conciousness via ice cream,) young Billy once again donned his brother's football helmet and blasted off into space, destination: McMire's ship.

After a considerable trip, Keen's ship slowed out of hyperspace and crept up to the underside of Mortimer's stealthy mothership. A simple frequency scan granted him access through some bay doors, and without a second's hesitation, Keen set out to dismantle key structures in this Universe-threatening ship!



  • KeenX Little Candies.png
    Little Candies
    100 points.
  • KeenX Yummy Cookie.png
    Yummy Cookie
    200 points.
  • KeenX Juicy Hot Dog.png
    Juicy Hot Dog
    500 points.
  • KeenX Fruit Snacks.png
    Fruit Snacks
    1,000 points.
  • KeenX Bowl of Nachos.png
    Bowl of Nachos
    5,000 points.
  • Episode X - Hyprician Link.png
    Hyprician Link
    Part required to finish the game.
  • KeenX Keygems.png
    Keygems used to open doors.
  • Episode X - Kirimpul Piston.png
    Kirimpul Piston
    Part required to finish the game.
  • Episode X - Neuclidium Core.png
    Neuclidium Core
    Part required to finish the game.
  • KeenX Neural Stunner.png
    Five extra shots.
  • Episode X - Pogo Stick.png
    Pogoing allows reaching otherwise inaccessible places (obtained upon entering the first level).
  • Episode X - Ponart Sensoscope.png
    Ponart Sensoscope
    Part required to finish the game.



There are three levelpacks made for this mod.

  • KeenRush has made a levelpack called xky1tuned. The 16 new levels of the level pack are considerably more difficult than the original levels of the mod.
  • Years later after his first one, KeenRush released another levelpack called xky1rooms. It's a remake of 14 of the levels from the original mod as one-room levels.

Technical Information

  • Graphics: custom graphics by Xkylyr Rauh
  • Levels: 18 levels
  • Tools used (incomplete list): ModKeen 1.0, CKPatch