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If you own a Steam Deck, Asus ROG Ally, or Lenovo Legion Go, download Storm 3 Full Burst via Steam. These devices emulate a PC, and the game runs flawlessly at 60FPS. You can even mod the game (adding custom characters). Unlocking the Hidden Leaf: The Truth About "Naruto
If you find a file claiming to be "Naruto Storm 3 for PSP," it is likely one of the following: Feature: Ad-hoc multiplayer for up to 4 players
A more traditional 1v1 fighting game. It is simpler than Impact but has a deep gear/customization system. and renamed it "Storm 3."
Someone has taken Naruto: Shinobi no Sato no Jintori Kassen (a PS1 fighting game) or Naruto: Ultimate Ninja (PS2), converted it to an EBOOT.PBP file for PSP, and renamed it "Storm 3."