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A Mod for Sonic Adventure DX (2004)


2.1.2 7mo
  • Addition The opening cutscene for a character will now play regardless of having Chao Gameplay mod.
  • Adjustment You can now lose a race.
  • Improvement Creating a new save file will now reset the current seed progression.
  • Addition Chaos 4 has been added.
  • BugFix Fixed a bug where the Back Ring wasn't sending you at the correct position.
  • BugFix Gamma and Amy victory quote should now play correctly.
  • BugFix Fixed a bug where AI could make Tails losing without racing.
  • BugFix Losing a race as Tails should no longer softlock the game.
  • BugFix Game Over should no longer reset the character and the mission.
2.1.1 7mo Addition BugFix4 2.1 7mo Adjustment2 Improvement8 Removal Addition17 BugFix5 2.0.2 8mo Addition3 Improvement2 Adjustment3 BugFix5 2.0.1 9mo Addition3 Improvement4 Optimization BugFix10
Sonic Adventure DX Randomizer is a mod for the PC version of SADX. This mod load random characters into random stages in a random order with some custom layout to make them beatable.
Big in Speed Highway? Amy vs Egg Viper? Sonic in Hot Shelter? Yeah, this is happening!

What does it randomize:
Character, Stage, Race AI, Partner AI, Music, Voices. It also adds extra content like Sonic Adventure 2 missions. (100 Rings, Lost Chao...)

Note: You can change the settings according to your play style. (sa2 missions, disable a character...) You can also swap Character and AI by pressing the Y button, just like in Sonic Heroes.

Note about Dreamcast Conversion mod: DC mod is now fully compatible with Randomizer, as long as the Rando is loaded AFTER DC mod. Which means it should be at the end of your mod list. Make sure both mods are also up to date.


Set up the mod:

1) Download and Install SADX Mod Loader.
2) Extract and Copy the "Randomizer" folder in the "mods" folder from your SADX folder.
3) You can configure the mod by selecting different settings. Open the SADX mod manager, select "Randomizer" in the Mods list, then Click on "Configure...".
4) If you want to race with a friend, make sure both of you are using the same "seed" in the settings, also make sure the seed used is different than "0". (0 makes the rng always different, when using another number makes it consistent.)

How to use:

Once you are done with the settings, start the game, create a new savefile, then enjoy the show!
A story ends once you beat a specific number of stages, which now include bosses, depending on the character selected.

For more information, please check the "README" in the mod folder.

If you are looking for Lost Chao location, you can check this video.

If you are curious about what the Randomizer will pick and what it will avoid you can check the Randomizer Level List Combination.
Obviously, the goal in the future is to increase the possibilites as much as possible.

If you need any help, or want to leave a feedback, feel free to join the Sonic Adventure Series Randomizer Discord.



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  • I really enjoy this randomizer, but I have some suggestions for improving it:

    - Give us an option to choose which SA2 missions we'd like to enable/disable (as opposed to simply enabling/disabling both types).

    - Give us an option to disable repeat stages and bosses.

    - Give us an option to be able to see all story cutscenes (in random order of course).

    And also I found a softlock. If you get Big's Twinkle Park as Super Sonic, he can't get underwater to press the switch that activates the rocket.

    Keep up the good work, I look forward to seeing what other features you add to the randomizer.
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  • This is a cool mod, really breathes new life into the game, especially with the latest updates adding new mission types!

    I wonder if there's a way to get the pinball physics in Sonic's Casinopolis working as other characters. Do you suppose there's a way to temporarily swap to Sonic when entering a pinball room and then swap back out when leaving?
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  • ZxAschNepSol avatar
    ZxAschNepSol Joined 4y ago
    301 points Ranked 52,386th
    7mo 7mo
    really cool mod, but after I tried out once and then uninstalled it, this ended up breaking Gamma's story, now whenever I try to do it, it just puts me in the room the jet booster would be in with no way to leave. no beginning cutscene or anything happens so I'm stuck with a broken save...
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  • tom avatar
    tom username pic Joined 19y ago
    End Boss Ripe Supporter TBS2 Manager Super Admin
    1,385 points Ranked 22,795th
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    tom avatar
    End Boss
    Great work!
    testing 1234 222
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  • Nathidraws avatar
    Nathidraws Joined 1y ago
    110 points Ranked 69,538th
    This is really cool :)
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  • HamStar avatar
    HamStar username pic Joined 3y ago
    Ripe Supporter SADX 2004 Manager
    4,073 points Ranked 1,811th
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    Amazing! I love it.

    How did you decide where/where not to add set items? For instance, there were springs in the end of Lost World and a rocket at the end of Emerald Coast Act 1 as Amy that were super not necessary.

    At the same time, I couldn't find a way to get across the first big gap in Sky Deck as Gamma or past the giant half-pipe in Twinkle Park as Big.

    Amazing work getting this to work in general though, it's awesome <3
    There are no bad Sonic games. avatar
    There are no bad Sonic games.
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