Gungrave looks kind of cool but it looks way different than the anime and so does the art. Am I missing something here? What's the story of this game?
Gungrave, the game series came first. The Anime is themed off of the original game series. Gungrave VR is the modern rebirth of the series and the third game. It was developed by a new developer under the supervision of the original developers... and is the oddball looking one of the bunch.
Go watch some youtube videos if you need to see more.