Sonic Heroes is a platform game in the Sonic the Hedgehog series, developed by Sonic Team USA and released in 2003 for the GameCube, Playstation 2 and Xbox. Kieranmay linked us to many beta videos from the game, as you can see below! Many cutscenes were still unfinished and the songs were changed for the final version.
Also, as we can read at Sonic Retro, various Sonic Heroes betas were leaked online:
Thanks to Jason for the english corrections!
Videos:
prototype of the early song “what I’m made of”
final version of what I’m made of
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U64 is an archive with articles, screens and videos for cancelled, beta & unseen videogames. Every change & cut creates a different gaming experience: we would like to save some documents about this evolution for curiosity, historic and artistic preservation.