River Patrol (Orca) suggests a specific version of River Patrol possibly produced or distributed by a company named Orca. Orca might be a developer, distributor or a company related to its manufacturing or release. Details on the specific changes or additions in this release are hard to find without more specific information. The core gameplay would involve navigating a river while shooting enemies, a common theme in arcade shooters. The mention of "Orca" may reveal unique aspects or differences in this specific version of the game compared to others.

River Patrol (Orca)

Riot City (Japan)