Gun Showdown (Sony PSP, 2006) - European Version for sale online | eBay
Gun (video game) - Wikipedia
Retro Review - Gun: Showdown - BagoGames
Gun Showdown Q&A - GameSpot
GUN: Showdown - PSP - #03. Honest Tom - YouTube
psp GUN SHOWDOWN Game (Works On US Consoles) REGION FREE PAL UK Version 47875810914 | eBay
Amazon.com: Gun Showdown - Sony PSP : Video Games
Gun Showdown on PSP came out 4 years before RDR1, and it also nails the cowboy vibe, with such a small open world and janky controls. : r/reddeadredemption