Sonic Adventure is a video game from the Sonic the Hedgehog series. It was the very first Dreamcast game. It was released in Japan on November 27, 1998, in North America on September 9, 1999 and in Europe on October 14, 1999. It is the first Sonic game to have 3D surroundings, instead of 2D surroundings like the other Sonic games had. It was released in Japan as one of five launch titles. It also has a sequel called Sonic Adventure 2.