About
Sonic Adventure DX: Director's Cut is the PC port of the 1998 Dreamcast platformer, following Sonic and five other characters across a large open-ish hub world. Players explore Station Square and beyond while defeating Dr. Eggman's schemes. The 2011 release is sold on Steam (app 71250). The community SADX Mod Installer adds widescreen and frame-rate fixes for a smoother modern experience.
Identity
Launch
- Binary
- Sonic Adventure DX.exe
- Needs files
- none beyond the binary
Proton
- Version
- GE-Proton
- Winetricks
- —
- ProtonDB
- ProtonDB Platinum runs flawlessly
⚙ Setup notes
Use GE-Proton for best compatibility. The Steam 2011 release runs well as-is, but in the in-game launcher you must switch the controller input from Keyboard to Gamepad or your controller will be ignored. For widescreen (16:9) and a smoother frame rate, run the SADX Mod Installer (SA Mod Manager / X-Hax sadx-mod-loader); it downgrades the 2011 build to the moddable 2004 version and the loader/manager needs the .NET runtime and VC++ 2022 (x86), which winetricks can supply. Vanilla runs at 4:3 and can dip from 60 to 40 FPS on the 2014 build.
The one thing to know
In the in-game launcher, switch controller input from Keyboard to Gamepad or the controller won't work. Vanilla is locked to 4:3 and the 2014 build can dip from 60 to 40 FPS; run the SADX Mod Installer for 16:9 widescreen and a frame-rate fix (it downgrades the 2011 build to the moddable 2004 version).
Community guides
Write-ups and threads from people who got this (or a similar) game running. deckport links to them — it doesn't reproduce them.
Get the artwork
deckport never hosts game images. Open this game on SteamGridDB, pick
the cover / hero / logo / icon you like, and drop them into the
game folder under .deckport-art/ before you push it to the
Deck. The importer files them under the right names automatically.
Run it on your Deck
Two files: the one-time importer (deckport.py) in your
Deck's home folder, and this game's install helper. Copy the game
into ~/Games and run the helper with Steam closed — it
writes the recipe (binary, launch options, Proton version)
and registers the shortcut with artwork.