Sonic Jam - extended prototype demo

Sonic Jam - extended prototype demo 2024-06-20.1

This is a patch for the Flash Sega Saturn Vol. 17 demo disc, which features a preview of Sonic Jam. That preview normally allows you to run around in Sonic World for 60 seconds, but the patch lifts this restriction.

This is a prototype version of Sonic World with a number of differences from the final version. The normal demo lets you see various object placement differences; this patched version lets you play the missions and see even more (like the blue check points and red balloons).

A few notes:
  • The mission panel is over by the bridge rather than by the entrance
  • A non-functional Giant Ring is just above the mission panel
  • You can't go in museums (due to a lack of files) - the game will crash if you do, so beware.

Apply the patch with Delta Patcher:
  • Original file: Flash SegaSaturn Vol. 17 (Japan) (Track 01).bin
  • XDelta patch: fss17-proto-demo.xdelta

A writeup with technical details is available at my website.
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bbayles
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