This version of Shot Rider was released under a Sigma license, suggesting Sigma may have been the distributor or possibly the developer. The exact role of Sigma in the game's creation requires further investigation. The core gameplay should be similar to the original Shot Rider, but variations are possible.  Tracing the game's history will require exploring relevant industry documents and potentially contacting Sigma directly (if still operating) for details on the licensing and distribution.

Shot Rider (Sigma license)

Shoot Out (Korean Edition)