Episode Y

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Episode Y
Title KeenY.png
Mod-ingame-Episode Y.png
Modded episodeKeen 1
ProtagonistCommander Keen
Release date
Latest update2003-06-19
HomepageGrelphy's Commander Keen page
Discussion(s)PCKF: development, release
Number of levels20
Secret levels1
New gameplay?No
New graphics?Yes
New levels?Yes
New sounds?No
New music?No
(4 votes)
Other mods in this seriesEpisode X,
Episode Z,
Episode Null

Keen Y: Extra Dark is a Keen 1 mod created by Grelphy, and is the sequel to Episode X, making it a continuation of the unofficial The Universe Is Toast trilogy started by Xky Rauh.


Commander Keen flies through the wormhole carefully scanning space for Mortimer Mcmire's second fleet. He sees a giant space station in the distance...

Later, landing at the station, Keen carefully creeps through the ship. However, Mort is taking no chances with his universe destruction device, and Keen is detected. Huge and dangerous tank robots chase him through the ship, and eventually he has to teleport through a one-way teleport, leaving behind his pogo and neural stunner.

Fortunately, Mort's station is well armed; Keen is quickly able to find a weapon. And some of the robots use specially designed Pogo Stick version 2.0. With these, Keen is as powerful as ever; but the enemies on Mort's ship are more formidable than anything Keen has ever met before.

The only way that Commander Keen can shut down the ship and get back to the Bean-With-Bacon Megarocket is to collect the four souped-up Power Cores that are hidden in various places on the ship. They are heavily guarded by vicious robots, and dangerous traps. Keen must collect them all, or...

The Universe is Toast!



  • Episode Y - Gear.png
    100 points.
  • Episode Y - Oilcan.png
    200 points.
  • Episode Y - Chip.png
    500 points.
  • Episode Y - CD ROM.png
    CD ROM
    1,000 points.
  • Episode Y - Computer.png
    5,000 points.
  • Episode Y - Pogo Stick 2.png
    Pogo Stick 2.0
    Pogoing allows reaching otherwise inaccessible places.
  • Episode Y - Power Cores.png
    Power Cores
    Four boxes required to finish the game.
  • Episode Y - Raygun.png
    Five extra shots.
  • Episode Y - Security Keys.png
    Security Keys
    Keys used to unlock doors.


Technical Information

  • Graphics: custom graphics by Grelphy
  • Levels: 21 levels, 1 secret level, 1 unused level, 1 world map
  • Tools used (incomplete list): CKPatch
  • Known bugs: A few level names are misspelled (like Labratory instead of Laboratory, for example), Switch Room is impossible to complete without cheats (one jump is too wide to make it).

Release History / Downloads