Een atoomexplosie wekt Gammera, een gigantisch vuurspuwend schildpadmonster, uit zijn miljoenen jaren winterslaap.
Nee, helaas is Gammera the Invincible nog niet beschikbaar op Netflix in Nederland.
| Writing | Richard Kraft | Writer |
| Directing | Sandy Howard | Director |
| Crew | Yonesaburo Tsukiji | Special Effects |
| Camera | Julian C. Townsend | Director of Photography |
| Directing | 湯浅憲明 | Director |
| Camera | Nobuo Munekawa | Director of Photography |
| Directing | Sid Cooperschmidt | First Assistant Director |
| Directing | Shima Abe | First Assistant Director |
| Visual Effects | Yonesaburo Tsukiji | Visual Effects |
| Visual Effects | Yonesaburo Tsukiji | Visual Effects Director |
| Visual Effects | Yonesaburo Tsukiji | VFX Director of Photography |
| Crew | Kiyoshi Ishida | Special Effects |
| Crew | Kiyoshi Ishida | Special Effects Assistant |
| Visual Effects | Kiyoshi Ishida | Visual Effects |
| Visual Effects | Kiyoshi Ishida | Visual Effects Director |
| Sound | Murray Rosenbloom | Sound |
| Production | Fran Wolf | Producer's Assistant |
| Production | L. Jeffery Norwalk | Production Assistant |
| Writing | Robert Myerson | Dialogue |
| Directing | Barbara Robinson | Script Supervisor |
| Writing | 高橋二三 | Screenplay |
| Sound | Wes Farrell | Original Music Composer |
| Sound | Artie Butler | Conductor |
| Sound | Artie Butler | Music Arranger |
| Sound | 山内正 | Music |
| Art | Hank Aldrich | Production Design |
| Art | Akira Inoue | Production Design |
| Production | Ken Barnett | Executive Producer |
| Production | Robert Baron | Associate Producer |
| Production | Yonejirô Saitô | Producer |
| Production | 永田雅一 | Executive Producer |
| Production | 永田秀雅 | Executive Producer |
| Production | Hiroaki Uejima | Production Manager |
| Crew | Tôru Suzuki | Special Effects |
| Crew | Tôru Suzuki | Special Effects Assistant |
| Crew | Akira Inoue | Visual Effects Art Director |
| Editing | 中静達治 | Editor |
| Visual Effects | 藤井 和文 | Visual Effects |
| Visual Effects | 藤井 和文 | Visual Effects Compositor |
| Visual Effects | Kiyoshi Kawamura | Visual Effects Production Manager |
| Visual Effects | Mamoru Ishizaka | VFX Lighting Artist |
| Lighting | Yukio Itô | Lighting Technician |
| Lighting | Mamoru Ishizaka | Lighting Technician |
| Sound | 大角正夫 | Sound Recordist |
| Sound | 大角正夫 | Sound Supervisor |
| Sound | Toshikazu Watanabe | Sound Recordist |
| Costume & Make-Up | 村瀬継蔵 | Costume Design |
| Costume & Make-Up | 八木 勘寿 | Costume Design |
| Costume & Make-Up | 八木 康栄 | Costume Design |
| Costume & Make-Up | 八木 正夫 | Costume Design |
| Visual Effects | 村瀬継蔵 | Modeling |
| Visual Effects | 八木 勘寿 | Modeling |
| Visual Effects | 八木 康栄 | Modeling |
| Visual Effects | 八木 正夫 | Modeling |
