I only know and have a copy of the E3 demo special version, where you can play the game, up to the Richter battle at the colosseum, because after you lose or win the battle, you'll get the message, coming soon, 1997.(if you use a library card, you can avoid the message and play the game, up to the end, but some dialogues are missing, only voice recording exists. Also the loading room on catacombs, isn't accessible from inside or outside catacombs. You'll have to use a library card to exit. Abandon mines, also aren't accessible, since the switch, that activates the skeleton ape, isn't on game)
Also it has the option to make a special start, where you start from catacombs, with increased stats and many equipment available.
Other than that, i don't know the existence of any other version/demo of the game.