CheatCodes.com has all the official International Superstar Soccer Pro '98 PSX cheats to unlock everything. If you know of any that we don't have, please let us know.
All published and official codes as of Saturday May 25, 2013 for International Superstar Soccer Pro '98 are shown below.
Highlight the "Exhibition menu", then press Up(2), Down(2), Left, Right, Left, Right, Circle, X. If you entered the code correctly, you will hear the sound of clapping hands. Then at the team selection screen, hold L1 + L2 + R1 + R2 and press X.
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