THE iDOLM@STER 2 is a game from THE iDOLM@STER series. It is similar to the original arcade and Xbox 360 incarnations of THE iDOLM@STER, but it was released under the 2nd Vision label. Though due to differences in the story, it seems to take place in its own standalone continuity. The player assumes the role of a producer who manages young Japanese pop idols.

Story Mode takes place around a half-year to a year after the idols first debuted. 765 Production is lacking recent success other than their idol unit Ryuuguu Komachi, which consists of Ami Futami, Azusa Miura, and Iori Minase, with Ritsuko Akizuki as their producer. Because Ryuuguu Komachi's success has made public interest in solo idols decline, the producer must take three of the nine remaining solo idols and make a unit. However, rival agency 961 Production organizes its own unit of male idols called Jupiter to beat 765 Pro.

Lessons and auditions have been reworked, but gameplay is largely similar to earlier games. Selectable idols include Haruka Amami, Chihaya Kisaragi, Yukiho Hagiwara, Yayoi Takatsuki, Takane Shijou, Hibiki Ganaha, Miki Hoshii, Makoto Kikuchi, and Mami Futami. There is a new game mode called Stage For You!, where all 13 idols are available, and instead of producing a unit, a stage is created with one, two, three, or five idols performing on it.

The PlayStation 3 version, released later, has some exclusive features, including a hard mode, guest performances in Stage For You! mode, and a "special episode" unlocked after the main story where the producer becomes Ritsuko's assistant to help Ryuuguu Komachi beat Jupiter.

The game has downloadable content available, which varies depending on console. The PlayStation 3 version has extra idols available as DLC: Touma Amagase, Hokuto Ijuuin, and Shouta Mitarai from 961 Pro's Jupiter, as well as Ai Hidaka, Eri Mizutani, and Ryo Akizuki from 876 Production. Both versions have exclusive DLC songs, and some DLC songs are available in both versions.