Can You Buy Physical PSP Go Games in Stores?

No. The PSP Go (2009) has no UMD drive — it's digital-only. Games are purchased exclusively via PlayStation Store (now closed for PSP).

How to Get Games Today

• PS3 / PS Vita: Log into same PSN account → Download List → download PSP titles (many still available).
• PC (Media Go - legacy): Sony's deprecated Media Go software may still download owned titles if you have an old backup.
• Adrenaline (Vita Homebrew): Run PSP ISOs/CSOs on Vita — requires hacking.

Physical Media?

None. Any "PSP Go game cartridge" listed online is a scam or a regular PSP UMD mislabeled.