|title=Sonic Adventure International
Sonic Adventure International is a Japanese exclusive re-release of the original Sonic Adventure. This re-release was due to Sonic Adventure being rushed to the market in Japan and having several bugs and unimplemented features. The US release had more development time thus the game was closer to what its developers had intended for it to be. Sonic Adventure International is the same as that version, but with added features.
Notably, complete English and Japanese language voice tracks are included, as well as subtitles in English, German, French, and Spanish. There is also a more solid framerate, tweaked cameras, additional voice clips and a number of new download contests (some country-specific). Some graphics were tweaked or changed completely such as the removal of the neon cowgirl billboard from Casinopolis. The World Ranking mode allows people from multiple regions to upload best times to an international scoreboard for prizes.
The Internet mode downloads from the original Sonic Adventure are compatible with this version. Below is a list of downloadables exclusive to this version.
Launch Party!: Celebrates the US and European Dreamcast launch with banners and balloons around Station Square.
Eme Chao (Emerald Chao): Japan only.
Sappha Chao (Sapphire Chao): Japan only.
Halloween Party: Decorates Twinkle Park with floating jack-o-lanterns decked out in witch hats and black capes.
Merry Christmas: A more compact Christmas file that decorates Station Square with 2 large Christmas trees: one in front of the train terminal and one in front of city hall. Tag either tree and the BGM changes to Dreams Dreams A Cappella from Christmas NiGHTS.
Sonic 2K #1: Part 1 of a 3-part contest sponsored by AT&T and Official Dreamcast Magazine. Adds AT&T and ODCM banners to Station Square. Speed Highway features AT&T banners and platforms. Playable as Sonic only and was only open to US players.
Sonic 2K #2: Part 2 of a 3-part contest sponsored by AT&T and Official Dreamcast Magazine. Adds AT&T and ODCM banners to Mystic Ruins. Tag a banner to receive a clue as to the whereabouts of 4 buried treasures. Playable as Knuckles only and only open to US players.
Sonic 2K #3: Part 3 of a 3-part contest sponsored by AT&T and Official Dreamcast Magazine. Decorates Sand Hill with AT&T and ODCM banners for a score attack challenge. Only playable as Tails and only open to US players.
Sonic Speed Challenge: A contest sponsored by Reebok. Find 5 pairs of Reebok DMX shoes hidden around Emerald Coast. Playable as Sonic only and only open to European players.
Neo Millennium: Two giant special Rings are hidden in each Action Stage. Tag one and the BGM changes to Palmtree Panic present from Sonic CD.
Samba GP: A new Twinkle Circuit course to mark the release of Samba de Amigo on Dreamcast (though the course has nothing at all to do with Samba de Amigo.) BGM is Super Sonic Racing (instrumental version) from Sonic R.
World Ranking #1: Time Attack as Sonic in Emerald Coast.