Freedom HQ was the headquarters, primary base of operations and "home-away-from-home" for the Knothole Freedom Fighters and Chaotix in the First and Second Robotnik Wars against Dr. Ivo Robotnik, Dr. Eggman and their seperate empires.
Originally, Freedom HQ was an old limestone cavern in Knothole, but this changed when the first members of the Knothole Freedom Fighters, following the apparent deaths of the Original Freedom Fighters, gathered together and fought in their place.
The base was initially destroyed and most of its occupants captured by Snively's diversionary attack on the base while Dr. Eggman and the newly-finished Egg Fleet finished with destroying Knothole. However, following the rescue of its citizenry by the five remaining base occupants (Sonic the Hedgehog, Knuckles the Echidna, Miles Prower, Amy Rose and NICOLE) and founding of New Mobotropolis, the base was re-built. (StH: #175, #176, #177, #185)
A while after, the Suppression Squad used some stolen Globe Posts to open a doorway from Anti Mobius to the Star Posts in Freedom HQ. They proceeded to start their take over of Mobius Prime with the Freedom HQ. For a short time Freedom HQ was under the control of the Suppression Squad, but eventually they were sent back home and the base was reclaimed. (StH: #189, #190, #196)
The base was built around the limestone cavern and directly into the cavern's rock wall for protection. It was also given a domed top for more protection and to house its solar arrays that supply the base with power. There are only three entrances to the base: the cliff-side-built Front Entrance, the Great Oak Slide, and the speedy secret passage leading in from the Great Forest. NICOLE can interface with the computer systems within, sometimes maintaining a link between the HQ and New Mobotropolis so that she can keep track of events in both.
- Common Room: A space for hanging out and recreation.
- The Bunks: A coded sleeping hall with personal space for each of the Freedom Fighters and Chaotix.
- The Lab: A high-tech space for science, research and development.
- Kitchen: The perfect place for a victory meal or late night snack.
Freedom HQ was originally the hideout for the new freedom fighters, but later served as vanguard outpost for Knothole Village. It currently serves as a decoy to draw Dr. Eggman's wrath away from New Mobotropolis.
The base's occupants are loyal to the Republic of Acorn.