Players take the role of the head of an entertainment company, and in order to form an extravagant music group and compete with other players, you'll need to get hold of new talented idols! Your role also requires to find suitable working environments, hire staff, and make your idol famous. Each girl has different abilities, and you can have them work together to combine their abilities so that they can get the job done. When any player has formed a group good enough to hold a concert at the Big Dome, the game ends and the player with the most money wins.
Each turn in the card game Idol Project, a new idol is revealed and it's up to the players to ensure that she will choose their studio and not someone else's. This is done by employing staff, purchasing equipment and becoming more famous. Having idols costs money, and the players can invest in stocks to keep the money coming.