Marvel United: Return of the Sinister Six

Marvel United: Return of the Sinister Six features villains Doctor Octopus, Electro, Kraven the Hunter, Mysterio, Sandman, and Vulture. Each can be confronted as a normal villain, but this expansion also offers a gameplay experience like no other through its "Sinister Six Mode", in which you get to play against all six of these villains together!

This is not a stand-alone game. A copy of the core box of Marvel United is needed to enjoy this expansion.