Hybrid Heaven (ハイブリッドヘブン) is a 1999 action role-playing video game developed and published by Konami for the Nintendo 64. It is set in a futuristic world where a mysterious organization known as the 'Hybrid Gods' have created a powerful new breed of cyborgs. The player takes control of a human-cyborg hybrid named Diaz, who is tasked with infiltrating the Hybrid Gods' base and thwarting their plans. The game features 3D environments and real-time combat, as well as an extensive character customization system. Players can choose from a variety of weapons and equipment, as well as upgrade their character's stats and abilities. The game also features a unique 'dynamic' enemy AI, which allows enemies to adapt to the player's tactics and use different strategies against them. Hybrid Heaven also includes a two-player cooperative mode, allowing two players to team up and take on the game's enemies together.