Information in the game database is updated periodically. Below, you'll find that information compiled as pertains to Sony Online Entertainment. The company may be involved as a publisher, developer or both.
The Agency 
DC Universe Online 
Free Realms 
GripShift [January, 2007]
Plants vs. Zombies [February 8, 2011]
Sideway: New York [October 11, 2011]
Untold Legends: Dark Kingdom [November 15, 2006]
Wheel of Fortune [March 19, 2009]
Wonderbook: Book of Spells [November 13, 2012]
DC Universe Online [November 15, 2013]
There are numerous companies in the industry, and their names change like the weather. The information above is not particular about the finer details. Acquisitions are common, so companies with no recent listings may still be developing games under a new name. For example, DMA Design currently has a Rockstar name. Do you know of a title that is not listed above but should be? Be sure and let a staff member know. You can contact staff if you click here.