Hybrid Heaven (ハイブリッドヘブン, Haiburiddo Hebun) is a 1999 action role-playing video game developed by Konami Computer Entertainment Tokyo and published by Konami for the Nintendo 64 console. It is the first 3D game in the series, and is set in a futuristic world where humans and aliens live together in harmony. The player takes on the role of Prototype, a human-alien hybrid created by the government to combat a powerful alien threat. The game features a unique blend of traditional role-playing elements and action-adventure elements, with a focus on exploration, puzzle-solving and combat. The game also features an in-depth character customization system, allowing players to customize their character's stats and abilities. Hybrid Heaven is an ambitious game that blends traditional role-playing elements with action-adventure elements, creating a unique experience. It is a deep and complex game that rewards those who take the time to explore its many secrets. The game was praised for its unique blend of genres and its deep and complex gameplay, although some criticized its difficulty.