This mod restores Dreamcast assets (levels, textures, sounds and some objects/effects) in Sonic Adventure DX PC. The main focus of this mod is porting Dreamcast Sonic Adventure Action Stages, Adventure Fields and boss arenas to SADX. Some level object ports have also been done to improve texture quality and restore missing detail, animations and effects. A companion mod called Sound Overhaul restores some of the deleted sounds and replaces most ingame sound effects with higher-quality sounds ripped from the Dreamcast version. The long-term goal of this project is to reproduce the Dreamcast SA1 experience in SADX PC as accurately as possible, including graphics, sound, branding etc. This mod is designed for use with SADX Mod Loader. It is split into several mini-mods which you can enable or disable independently.
When the Dreamcast was still around, it had a lot of downloadable content for many games in its library. You would connect to the Internet using the Dreamcast's built-in model, launch a browser (often directly from the game) and download the content to your memory card (VMU). When placed on the VMU, those downloads added or unlocked new features in the game.
Sonic Adventure also had a lot of DLCs. There were simple event DLCs that added decorations to Station Square, and there were also time challenges (with real prizes!) sponsored by different companies. There were DLCs that added new music, level decorations and Twinkle Circuit tracks. Together with other online features of Sonic Adventure (leaderboards, Chao Black Market) the game world almost seemed alive. Although I personally didn't have a chance to experience it back then, even now I can tell there is something special about starting the game on Christmas eve and discovering that it plays Christmas carols. You can even find a Christmas greeting from the mayor of Station Square. For a 1998-1999 game, it really seems like Sega was ahead of everyone else, trying to make the game feel "connected" with the player and the world in ways that weren't common at the time.
Sadly we all know what happened to the Dreamcast. When the console died, the online services went offline as well. In recent years, the enthusiasts in the Dreamcast community have been restoring a lot of online functionality for different games, and if you have a Dreamcast that can connect to the Internet, you can have an almost authentic experience of what it was like to use Sonic Adventure's online features back in 1999-2000. Thankfully, the DLC content has also been preserved for the most part (except one event DLC that seems to have been lost to time), and if you have a Dreamcast you can play the majority of it. However, up until now there was no way to play the DLCs in the PC version.
Recently, thanks to sonicblur's tool for decrypting VMU downloads I was able to extract model, texture and sound data from SA1 downloads. Some time later Daguar pointed me to the structure in the DLC file that contained information about objects (position, rotation etc.), and soon the DLC content was understood well enough so I began work on recreating the DLCs as SADX mods.
Obviously the mods aren't exact 1:1 recreations. There is no Internet connectivity, and the results of time challenges are only displayed on screen. I also did my own take on the HUD/timer, which scales well in HD resolutions. Other than those, the recreations are pretty close to the original downloads because they use the exact same models and position data from the DLCs. So if you've never played the Dreamcast version and want to learn more about the DLCs, these mods will give you a fairly accurate impression of what they were like.
Here's a list of my DLC recreations for SADX:
1) Samba Grand Prix - this download was originally made to celebrate the release of Samba de Amigo on the Dreamcast. The mod adds an extra Twinkle Circuit track that you can play by going through the gate that appears in Station Square main area. When playing as Sonic, the usual Twinkle Circuit music will be replaced by an instrumental version of Super Sonic Racing. An additional feature of the mod that wasn't present in the Dreamcast DLC is access to the other Twinkle Circuits that were never officially unlocked in the original game or SADX. To access them, go to the same Samba GP gate as Tails, Knuckles, Amy or Gamma. You can still play the regular Twinkle Circuit course if you go to the Twinkle Park entrance.
2) Y2K Millenium Celebration - an event download to celebrate the arrival of a new millenium. Big golden rings were placed in different levels. They showed a message and played music from Sonic CD when you touched them. Although there's no counter to show how many rings you've found, it's still fun to look for them in different stages. Twitter's DLC of choice.
3) Famitsu Hide-and-Seek challenge - a contest sponsored by the Famitsu magazine in Japan. You have to find 5 pictures of a real-life hedgehog within a time limit. Before playing this on the PC version, make sure you've updated the "Dreamcast Station Square" mod!
4) QUO card challenge - the concept is similar to the Famitsu contest, but this time you have to find 6 QUO cards with the portrait of Hidekazu Yukawa (also known as Mr. Sega) in Station Square and Mystic Ruins. QUO is a kind of prepaid cards that can be used at convenience stores, hotels etc. nationwide in Japan. They're still around actually! To fully enjoy this challenge, make sure you're playing with the latest version of Sound Overhaul 2, as it adds Yukawa's ridiculous "Yuss!" voice clip that plays when you find a card.
5) Dreamcast Launch party - 3 very similar downloads released in Japan, the US and the UK to celebrate the Dreamcast launch. Places balloons and posters around Station Square.
6) AT&T "Sonic 2K Contest" part 1 - Assault on Speed Highway - a contest sponsored by AT&T and the Dreamcast magazine. Sonic has to run through a slightly modified version of Speed Highway Act 1 within a time limit. The level features AT&T banners and rotating platforms with AT&T logos on them.
7) AT&T "Sonic 2K Contest" part 2 - The Sonic2K Hide & Seek game - another contest where Knuckles has to find 4 treasures hidden in the Mystic Ruins main area.
8) AT&T "Sonic 2K Contest" part 3 - The Sonic2K Sand Hill Attack - the final contest that features a modified version of Tails' Sand Hill with 10 gates to go through within a time limit.
9) Reebok DMX challenge - a European contest sponsored by Reebok. You go to a modified version of Emerald Coast with Reebok banners and posters, and collect 5 pairs of shoes stolen by Dr. Robotnik. When you collect the first pair of shoes, the music changes to the track you hear when fighting other characters in the story. Pretty fun and challenging event.
10) Halloween event - a download that added graffiti and jack-o'-lanterns in Twinkle Park. There isn't any meaningful gameplay involved with this DLC, but it's still nice to have those decorations.
11) Christmas 98 (mod coming December 23) - a DLC that only came out in Japan. Places many small Christmas trees around Station Square that show messages and play music when you touch them.
12) Christmas 99 (mod coming December 17) - another Christmas download, but this time it places 4 large Christmas trees around Station Square that play music from NiGHTS and show a message when you touch them.
Note! Please enable only ONE DLC mod at a time, otherwise the content will not activate. To access DLC content, please start the game in Adventure Mode.
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This is a setup program that installs SADX Mod Loader, Dreamcast Conversion and several other mods on any version of SADX.
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