Vulkan

"Get to your beach house or ski chalet in record time with your very own weapon of aerial destruction, the Vulkan. A state-of-the-art fighter jet with air-to-air missiles fitted on each wing, the Vulkan is the Rottweiler of dogfighting."

- Unused description, Grand Theft Auto V

The Vulkan is a cut military fighter jet in Grand Theft Auto V.

Grand Theft Auto V
The Vulkan was originally going to be in Grand Theft Auto V, but it was cut for unknown reasons. The jet had the exact same appearance of the Hydra except with the badging saying "V-22" instead of the Hydra's "H-27", as well as the Hover Mode capability. It was also capable of firing two missiles at once, unlike the other aircraft in the game which can only fire one missile at a time. As the jet was eventually re-badged and added to the game as the Hydra (in Grand Theft Auto Online only), the Vulkan is unlikely to return to the game.