Anti-Registration is a side in the Superhero Civil War serving as the main conflict for a large portion of the story of Marvel: Ultimate Alliance 2. Notable heroes on this side of the conflict led by Captain America, and the group defected S.H.I.E.L.D. Agents known as White Star.
Team Members: Captain America, Luke Cage, Daredevil, Wolverine, Storm, Iron Fist, Invisible Woman, Human Torch, Cable, Black Panther, Cyclops, Colossus, Justice, Patriot, Multiple Man (Jamie Madrox), Havok, Prodigy, Spider-Woman, Firestar, Cloak, Dagger, Hercules, and Goliath
How to choose
To choose the Anti Registration side, [the rebels], when you visit Maria Hill, you have to kill all the robots surrounding her.