ソニックアドベンチャー
"Sonic Adventure" received critical acclaim and became the Dreamcast's bestseller, with 2.5 million copies sold by August 2006. Reviewers lauded the visuals and gameplay, calling it a major technological advancement; some speculated that it could re-establish Sega as the dominant console manufacturer after the relatively unsuccessful Saturn. Others were frustrated by the camera controls and glitches, and reactions to its audio were mixed. Reviews for later releases were less positive; critics felt the game had not aged well and ran at an inconsistent frame rate. Despite this, journalists have ranked "Sonic Adventure" among the best "Sonic" games, and it is recognized as an important release in both the series and the platform genre. A sequel, "Sonic Adventure 2", was released in 2001.