PC versionDreamcast/GameCubeWIP Fans have made a PC version. Some are still early, so read the project page first.
Fans took Sonic Adventure 2 (OpenSA2) apart and rebuilt it so it runs natively on a computer, often with widescreen, higher frame rates and mods. Here is the project we know about:
A native Sonic Adventure 2 port by static recompilation for Linux, Windows, and Android. Experimental source preview.