I felt it improved on a lot of things from the original Sonic Adventure such as better graphics and controls and a story that was simpler to follow and felt like a summer action movie. I loved (and still love) Sonic Adventure 2.
A few years later it was re-packaged as ‘Sonic Adventure 2: Battle’ and released on Nintendo GameCube along with a few enhancements. Sonic Adventure 2 originally launched over 11 years ago, all the way back in 2001 to celebrate Sonic’s 10th anniversary and was released on the Sega Dreamcast.