Unlike Sonic CD , Sonic 1 & 2 , or even Sonic Forces , Sega has not released a native ARM build of the Dreamcast original for Android smartphones. The only official way to play the Sonic Adventure franchise on mobile is via two specific routes:
A new method for 2025 is (a Windows x86 emulator for Android). You can install the Steam or PC CD-ROM version of Sonic Adventure DX on your phone.
Requires a modern, powerful Android device with a high-end Snapdragon processor for full-speed gameplay.