Double Sequence - The Q-Virus Invasion (USA) (En,Fr,De,Es,It) is a Nintendo DS game developed by Enterbrain. The Japanese title of the game is 'Daibuserīzu Q-Virus Shuurai'. Set in the near future a deadly virus has infected the world, and the player must team up with a special agent to find a cure. Players assume the role of a special agent and must explore the world in search of a cure for the deadly Q-Virus. The agent is accompanied by a robot sidekick called 'Q-Bot', who helps the player navigate through the world. The game features various mini-games and puzzles which the player must complete in order to progress. Players can also battle against enemies using an innovative battle system. The battle system is based on a card game, where the player has to select cards from a deck to use special abilities and attacks. The game also features a variety of items and equipment which can be used to upgrade the player's character. The game features a unique art style that combines 3D graphics with hand-drawn illustrations. Additionally, the game includes a variety of voice-acted characters, as well as an original soundtrack. Double Sequence - The Q-Virus Invasion (USA) is an engaging and challenging game that is sure to provide hours of entertainment. With its innovative battle system and unique art style, this is one game that Nintendo DS fans won't want to miss.