Successfully complete the game with Godzilla to unlock the following bonuses.

Concept Art: Pictures 1 through 24.
Levels :London, Monster Island, Mothership, New York, Seattle, Tokyo.
Monsters: Baragon, Battra, Mecha King Ghidorah, Mechgodzilla2, MegaGurious, Methra, Moguera, Obsidius, Orga, Space Godzilla, Godzilla 1990, Jet Jaguar.
Video: Trailers, Video 1, Video 2.