Information in the game database is updated periodically. Below, you'll find that information compiled as pertains to Sting. The company may be involved as a publisher, developer or both.
Koguru GuruGuru [July 1, 2001]
Evolution Worlds [December 3, 2002]
Evolution: Eternal Dungeons 
Baroque [May 21, 1998]
Flying Hero: Bugyuru no Daibouken [December 15, 1992]
The Jetsons: Invasion of the Planet Pirates [June, 1994]
Melfand Stories [March 25, 1994]
Solid Runner [March 28, 1997]
TKO Super Championship Boxing [October, 1992]
Treasure Hunter G [May 24, 1996]
Digital Monsters: D Project [August 3, 2002]
Hanjuku Eiyuu: Aa, Sekaiyo Hanjukunare...!! [February 14, 2002]
Riviera: Yakusoku no Chi Riviera [July 12, 2002]
Wizardry Scenario #1: Proving Grounds of the Mad Overlord [March 1, 2001]
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.