Information in the game database is updated periodically. Below, you'll find that information compiled as pertains to Ongakukan. The company may be involved as a publisher, developer or both.
The Keihin Kyuukou: Train Simulator Real [October 31, 2002]
Train Simulator + Densha de Go! Tokyo Kyuukouhen [December 18, 2003]
Train Simulator: Keisei - Toei - Keikyu [August 25, 2005]
Train Simulator: Kyuushuu Shinkansen [September 28, 2005]
Train Simulator Midousuji-Sen [October 22, 2003]
The Yamanote Sen: Train Simulator Real [October 4, 2001]
Mobile Train Simulator + Densha de GO! Tokyo Kyuukou Hen [February 17, 2005]
Mobile Train Simulator: Keisei - Toei Asakusa - Keikyuusen [February 23, 2006]
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.