The quadrotor is a type of unmanned helicopter
Warfare of Annihilation: Modern Combat Edit
Ingame, the quadrotor appears used by the US Military and appears armed with a sub machinegun.
In multiplayer the quadrotor appears being available to all factions, being armed with a sub machinegun. the quadrotor can be opperated from a controller found on certain maps. It is a manuverable and fast aircraft.