Sonic Adventure DLCs

Sega had many downloads for Sonic Adventure as it was a launch title for Dreamcast as well as the Dreamcast most popular game (2.5 million as of June 2006). Most of these downloads were events and challenges that mostly took place in Station Square. These events were to celebrate an actual event or for competitions that were hoasted by Sega.

The Data for these events were already present in the game and the dowloadable content updated the game to use the data for the events.

One major Downloadable Content was the different Chao that can be uploaded and downloaded online.

Dreamcast Launch
"Welcome to the Dreamcast Launch! This is just the beginning."

- Message from poster.

While the posters and language varied, it is generally the same of Dreamcast posters and baloons that thank you on behalf of Sega and Sonic Team when jumped at.

Halloween
"Halloween Party is being held at Twinkle Park now!"

- Message from poster.

During Halloween, Station Square will have posters advertising Twinkle Parks Halloween party. Actually it is just has these Pumpkin witch like characters everywhere moving in short circles. They are mostly at Pleasure Palace with large purple "Trick or Treat" textures on the ground.

Christmas
"Merry Xmas!! Please keep in touch with Sonic."

- Message from tree.

This download places Christmas trees outside the station and also at the town center. Jumping at them will give a festive message as well as change Station Squares theme to the Acapella version of Dreams, Dreams from Christmas NiGHTS into Dreams. Heading to the other parts of Station Square will reset it's theme back to it's usual theme.

Y2K Celebration
"A happy new year in 2K! Wish you a good new year!"

- Message from poster.

"A happy new year in 2K! Please Support Sonic in 2K!"

- Message from poster.

There are also other posters on Knickles digging through 2K!, Tails smiles through 2K! and Sonic runs through 2K!. Also near the station is a large ring with the message "Millenium 2000 Welcome" in it's center. Touching this will change Stations Square theme to be more happy and challenge the player to find these rings in Action Stages. Finding them will also change the stages music to the party theme.

AT&T/ODCM
AT&T and Official Dreamcast Magazine teamed up to release three time attack contests. One involved blazing through Speed Highway as Sonic, the next involving Knuckles collecting treasures in the Mystic Ruins and the final one involving Tails surfing through ten specialy marked gates in Sand Hill.

Hedgehog Hide and Seek
Outside the station is a large red sphere. Jumping at it will begin the game. Around Station Square there are 5 pictures of actual hedgehogs that you must find. Once they are all find you must go into the Station and jump at the light blue sphere to finish the game.