N3: Ninety-Nine Nights, or simply Ninety-Nine Nights, is a fantasy hack and slash video game developed exclusively for the Xbox 360 by an alliance between Q Entertainment and Phantagram. Phantagram is a South Korean based developer noted for creating the Kingdom Under Fire series. Q Entertainment is a Japanese developer best known for its Lumines and Meteos series. Video game designer Tetsuya Mizuguchi served as producer for the game. The game features hundreds of enemies onscreen at any given time, and borrows heavily from other video games of the genre, most notably from the Dynasty Warriors series and the two Kingdom Under Fire games.