There was also an exclusive mini-game called Chao Adventure that was played with the Visual Memory Unit (VMU). There were very few breeds of Chao, and the garden contained many inhospitable landscaping features. The Chao Garden had only a few- now standard, features: giving Chao fruits and animals, showing affection with each character, branching evolution based on skills, and racing. 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.