Green Hill (IDW)

The Eggman Empire Fortress is a location that appears in the Sonic the Hedgehog comic series published by IDW Publishing. It is a colossal fortification on Sonic's world that served as the Eggman Empire's military headquarters.

Description
The Eggman Empire Fortress is a high-tech fortification with spotlights. It is located in the middle of a deep crater whose edges are surrounded by high walls. These walls extend into the depths of the crater, forming staircase-like levels. Rising up from the center of the crater is a massive high-tech tower with tall metallic pieces forming hoops circling around it. The fortress also has several floating platforms.

Past
In the recent past, the Eggman Empire fortress served as the site where Sonic the Hedgehog and his allies defeated Dr. Eggman and broke the Eggman Empire's control over their world. During this battle, Sonic squared off against Eggman and his Death Egg Robot.

Trivia

 * The Eggman Empire Fortress is based on the location of the same name that appears in Sonic Forces.