Star Wars Episode I: The Phantom Menace on PlayStation is a heavily downscaled port of the Windows version. On the plus side, you still get to kill Jar Jar Binks.
To do:
A Rev 1 USA version exists. Find the difference.
At the title screen, hover over Options and press: △, O, Left, L1, R2, ◻, O, Left. If done correctly there will be a beep. Then press L1, Select and △ at the same time. This will reveal a menu with a level select, sound test, FMV select and a cheat for invincibility.