Wakko's Adventure (video game)

Wakko's Adventure is a platform video game developed by Amblin Entertainment and Warner Bros. Interactive and published by Sony for the PlayStation in 1999. The game is the only installment in the Sonic the Hedgehog series to have been released for the console. Sonic CD follows the titular Sonic the Hedgehog as he attempts to save Amy Rose and Little Planet from Doctor Robotnik and Metal Sonic. The game features the debut appearances of Amy Rose and Metal Sonic, both of whom have gone on to become recurring characters in the Sonic series. Time travel is a key aspect to both the story and gameplay, with nearly every stage containing four different variations (one for each time period) featuring alternate stage layouts, music, and graphics.

Development of the game began in after the completion of the original Sonic the Hedgehog as an enhanced port of Sonic the Hedgehog 2, but was later split into a separate project. Upon its release, Sonic CD received critical acclaim, with critics praising the game's graphics, gameplay, and audio; some have called it one of the best games in the series.[4][5][6] The game's success has led to it being ported a number of times, first to Microsoft Windows as part of the Sega PC brand in 1996, and to both the PlayStation 2 and GameCube as part of Sonic Gems Collection in 2005. Beginning in the early 2010s, enhanced ports of the game were also released for various other platforms and mobile devices.