The destruction and mayhem portrayed in this movie can be compared to a Godzilla movie.
American planes shoot an unidentified plane which was carrying a bomb (presumably atomic or nuclear). The plane is shot down and spirals toward the arctic ground, the plane hits the ground and an atomic explosion occurs.
The arctic ground starts cracking and the snow flies everywhere. A giant turtle awakens and crawls out of his icy tomb. The turtle (Gamera) walks toward a japanese shipping vessel and destroys it. The crew is shown dorwing in water or crushed by rubble.
Gamera knocks down a lighthouse, while a 12 year old kid tangles from it's height, Gamera does catch the kid when he falls, but the lighthouse is stull demolished.
The camera shakes in many scenes and noises are heard, this is depicted that Gamera is heading toward a power plant (as we're told through a character's dialogue).
Tanks and other military personel prepare for gunfire in a few scenes, ready for Gamera's appearance.
The military reset a power line so the power is at a 350,000 kilowatt output. Gamera destroys the power line, fire erupts, sparks are flying, but no effect on Gamera.
Tanks and guns are fired at Gamera. Gamera destroys a nuclear power plant in the process. Debree is flung in the air.
Multiple scenes of Gamera destroying Tokyo and other cities. Planes, tanks, and other military personal have no effect on Gamera.
A train is used as a weapon. The tanks on the train are filled with a gas and each train car explode on Gamera.
Gamera is lured into a shuttle and is shot into space.
