River City: Rival Showdown is an action game developed by Arc System Works and released on Nintendo 3DS. Continue Reading → Jump to a section: Home Releases Credits Overview Walkthrough Achievements Cheats River City: Rival Showdown Brainwaves View all → Discussion Article Thought Review 100 Share River City: Rival Showdown with others River City: Rival Showdown Releases Credits Characters List Overview Walkthrough Achievements Cheats Updates