7th Dragon (ナナドラゴン) is a role-playing video game for the Nintendo DS developed by Imageepoch and published by Sega in Japan. It is the first installment in the 7th Dragon series. The game takes place in the year 2100, when the world is threatened by dragons. The player takes on the role of a leader of a team of adventurers who must travel through time to defeat the dragons and save the world. The game features a turn-based battle system with a unique 'Skill Tree' system that allows players to customize their characters' abilities. It also features a variety of weapons, equipment, and items to collect. The game also includes an online mode that allows players to team up with their friends and fight against powerful bosses. 7th Dragon is a unique and engaging RPG that provides an exciting experience for all players.