Sony Playstation Games Solutions - One of
the Largest Games Source for PSone Cheats, PSX Codes, Hints, Tips,
Walkthroughs, FAQs and Games Strategy Guides.
On the selection screen (where you get game start,
time attack, etc.) enter R1, Up, L2, Down. The single
player "story mode" should now have the words "Another
World" below it and contains modified versions of the
original levels.