the 3rd in a series and boy does it pack a punch. what i like about the heisei era of gamera films is a decent enough storyline to keep you interested which are usually missing from kaiju films. especially the ones made in this era.
the story is about a young girl whose parents were accidentally killed by gamera during the events of the 1st film of the trilogy, resulting in an intense hatred towards gamera. when the girl discover the monster iris, who has just hatched from an egg, she establishes a bond with the creature. her quest for revenge against gamera becomes a possibilty when iris learns hatred towards the giant turtle also, resulting in a battle between the two.
the special effects are even better than that of the previous title, attack of legion, with the gyaos taking realistic evasive manouvres from gamera's fireballs, people being tossed around as gamera storms through the city, and theres even gamera and iris tearing a train station apart as they beat the  out of each other. iris also looks good as most shots of him involve CGI in some way(the traditional rubber suit but with CGI tentacles). it's an ok length a film as well, not too long and not too short, the balance is just right.
the special features are also worth a look, with optional language settings, trailers, gag reel and even commentary from gamera himself!!! overall, its a great buy and a must have for any kaiju or gamera fan. you wont be disappointed