| Date | What happened |
| about 2003 |
Concept is shown on a magazine
|
| Jul 26, 2005 |
 'THE IDOLM@STER' for arcade is released |
| Jan 25, 2007 | 'THE IDOLM@STER' for Xbox360 is released |
| Feb 28, 2008 | 'THE IDOLM@STER LIVE FOR YOU!' for Xbox360 is released |
| Feb 19, 2009 | 'THE IDOLM@STER SP' for PSP is released |
| Sep 17, 2009 | 'THE IDOLM@STER Dearly Stars' for NDS is released |
| Dec 21, 2010 | 'THE IDOLM@STER Mobile' for feature phone is released |
| Feb 24, 2011 | 'THE IDOLM@STER 2' for Xbox 360 is released |
| Oct 27, 2011 | 'THE IDOLM@STER 2' for Xbox 360 is released |
| Nov 28, 2011 | 'THE IDOLM@STER Cinderella Girls' the social game is released |
| Mar 30, 2012 | 'THE IDOLM@STER Mobilei' for iOS is released |
| Oct 25, 2012 | 'THE IDOLM@STER SHINY FESTA' for PSP is released |
| Apr 22, 2013 | 'THE IDOLM@STER SHINY FESTA' for iOS is released |
| Feb 27, 2013 | 'THE IDOLM@STER Million Live!' is released |
| Oct 2, 2013 | 'iM@s Channel' for PS3 is released |
| May 15, 2014 | 'IDOLM@STER One For All' for PS3 is released |
| Jul 17, 2014 | 'IDOLM@STER SideM' is released |
| Sep 3, 2015 | 'IDOLM@STER Cinderella Girls Starlignt Stage' for iOS and Android is released |
| Dec 10, 2015 | 'IDOLM@STER Must Songs' for PS Vita is released |
| Jul 28, 2016 | 'IDOLM@STER Platina Stars' for PS4 in a plan to be released |