Resistance HQ is a location that appears in the Sonic the Hedgehog comic series and its spin-offs published by IDW Publishing. It is the secret base of operations for the Resistance, where its members plotted their schemes to oppose the Eggman Empire.
The only room seen in Resistance HQ is a rectangular room, of which one half of it was used for meetings between the Resistance's members and allies. In this room there is a massive display monitor. There are also wooden crates all over the place, as well as cracks in the floor and cables lying around. Growing in the center of the HQ is also a five-petaled yellow flower.
The HQ is situated in an urban environment, though its exact location is unspecified and how it looks from the outside is unknown.
The Fate of Dr. Eggman
After discovering that Neo Metal Sonic was the new head of the Eggman Empire and the ringleader behind the recent Badnik attacks, Sonic had a meeting with Tails, Knuckles and Amy in Resistance HQ. There, he informed his friends of how Neo Metal Sonic was working on conquering the world for Dr. Eggman using some kind of plan. In an effort to undermine Neo Metal Sonic's scheme, Sonic and co. decided on searching for any old plans that could tell them what Neo Metal Sonic was up to. Amy in particular put out a call to all Resistance members to gather additional help for the search.
While continuing his work in Resistance HQ with Amy, Knuckles sensed the Master Emerald calling out to him. Immediately after, they were contacted by Sonic and Silver. Having discovered Neo Metal Sonic's plan, Sonic told Knuckles and Amy to call in everybody.
Battle For Angel Island
Gathering their strongest allies, the Resistance brought them all to a meeting in Resistance HQ. There, they revealed that Neo Metal Sonic had taken over Angel Island and turned it into a flying fortress. To make matters worse, Neo had also taken control of the island's Master Emerald. With their goal being to liberate Angel Island, Amy came up with a strategy after some internal discussions: team three (Sonic and Knuckles) would confront Neo and secure the Master Emerald while team one (Blaze) and team two (everyone else) focused on breaking the Egg Fleet's control of the island. With that being settled, the group headed for Angel Island in a Resistance Battleship.