
This was the first game to ever feature Chao, and thus had the most basic system compared to later games. Dreamcast Engine 1998: Sonic Adventure 1 (Dreamcast) Let’s take a look at the timeline of the games and just how the Chao system developed.

We can generally split the Chao systems up into two types - The Dreamcast games use the ‘ Dreamcast Engine’, and non-Dreamcast ( Modern) games, use the ‘ Gamecube Engine’.

Since then, bother Sonic Adventure and Sonic Adventure 2 have been released, ported, and rebranded multiple times over many different formats. Chao have been present in the Sonic Adventure games since 1998 (Japan) on the Sega Dreamcast.
