Can You Download Guitar Hero on PSP? No Official Release

No. Guitar Hero was never released on PSP. The series skipped Sony's handheld due to:

• UMD storage too small for full soundtrack + audio streaming.
• No guitar controller peripheral produced for PSP.
• Development focus on PS2/PS3, Xbox 360, Wii, PC.

PSP Rhythm Game Alternatives

• DJ Max Portable / Portable 2 / Clazziquai / Black Square – Korean arcade-style, button-based, excellent.
• Patapon 1/2/3 – Rhythm + strategy, unique art, no peripheral needed.
• Gitaroo Man Lives! – Quirky, guitar-hero-like but button-based, from original creator.
• Rock Band Unplugged – Only Rock Band on PSP; uses face buttons + shoulder for lanes. Good setlist.
• Taiko no Tatsujin (JP) – Drum rhythm; import or CFW.

Emulation Note

Running PS2 Guitar Hero via PCSX2 on PC works well; PSP cannot emulate PS2.

Stick to native PSP rhythm games—they're designed for the hardware.