Assuming you have already obtained a clean Supa_Strikas.iso file, follow these steps:
The game was never a massive commercial hit. It was published by a smaller studio (Cobra Mobile) and distributed in limited regions (mainly South Africa, Australia, and parts of Europe). As a result, physical UMDs are collectors’ items costing over $100 on eBay. Supa Strikas Psp Iso Download
The Internet Archive (archive.org) hosts thousands of “redumped” game ISOs for preservation purposes. Search for “Supa Strikas (Europe) (En,Fr,De,Es,It,Nl).iso” on Archive.org. Files uploaded by verified users are generally safe. Assuming you have already obtained a clean Supa_Strikas