River City: Rival Showdown

Big Trouble in River City! Mystery is afoot once again for Kunio and his River City pals! One night, Kunio is attacked by two mysterious individuals. On top of that, Riki's girlfriend has disappeared, and it's up to Kunio to find out the truth! Kunio has just 3 days to unravel the mystery, and he'll need your help to take down all who stand in his way! - Different Story Paths and Different Endings! - Bonus Double Dragon Fighting Game Included! - 2 Player Local Co-Op Play! Grab a friend and team up together!
- Genres: Fighting, Role-playing (RPG), Hack and slash/Beat 'em up, Adventure
- Released: 2016-10-27
- Platforms: Nintendo 3DS
- Series: Downtown Nekketsu
Track River City: Rival Showdown in your Gamepouch
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- Downtown Nekketsu March Super-Awesome Field Day!
- Downtown Special Kunio-kun's Historical Period Drama!
- Surprise! Nekketsu New Records! The Distant Gold Medal
- Downtown River City Baseball Story: Play Ball, Kunio!
- Downtown Nekketsu Monogatari EX
- Downtown Nekketsu Dodgeball
- Riki Densetsu
- Kunio-kun no Nekketsu Street
- Downtown Nekketsu Jidaigeki
- River City Super Sports Challenge: All Stars Special
- Stay Cool, Kobayashi-san!: A River City Ransom Story
- River City: Rival Showdown
- Downtown Nekketsu Monogatari 2