Balam is a 50-metre giant, a smaller variant of the Moving Fortress X-4 developed for an unclear "operation" that concluded before it was ready (possibly a reference to Earth Defense Force 2017's Vallak Dino Mech battles) and placed in storage. With the emergence of the monster Erginus the Balam was hurriedly made ready for combat and deployed to deal with the new threat. Balam is the only vehicle in the game which can be controlled by any class; normally, Fencers and Wing Divers cannot drive a vehicle.