If you find a file labeled "Uncharted PSP Iso.rar," be cautious; it is likely either a fan-made mod (often of Tomb Raider or Indiana Jones games), a scam, or actually a PS Vita file that won't run on a standard PSP. Uncharted: Golden Abyss REVIEW (PS VITA) HD Gameplay
There is no official game for the PlayStation Portable (PSP)