Enter Commander Keen - the alter-ego of an eight year-old genius by the name of William J. "Billy Blaze" Blazkowicz II, grandson of WWII Allied war hero B.J. Blazkowicz of Castle Wolfenstein fame.

When Billy learns that the Earth is in danger, he dons his brother's football helmet and his homemade interstellar spaceship to become Commander Keen - Defender of the Earth!

Secret of the Oracle is the first episode of the Goodbye Galaxy! miniseries.

After defeating Mortimer McMire at the Vorticon homeworld, Keen begins to return to Earth to continue his normal life. Along the way, his faster-than-light radio picks up a plot by the Shikadi to destroy the galaxy! Quickly jumping to action, Keen rushes to Gnosticus IV in search of the Keepers of the Oracle to consult them on what to do. However, upon arriving, Keen discovers that the Keepers have been kidnapped!

Keen must save the Keepers and learn why the Shikadi are so keen on destroying the galaxy... before it's too late!

The entire game is available for download free on Commander-Keen.com!