Sonic the Hedgehog Pocket Adventure
In August 1999, SNK announced that they were collaborating with Sega to develop a "Sonic the Hedgehog" game for their Neo Geo Pocket Color handheld system. The game was developed by SNK, with supervision from Yuji Naka and Sonic Team at Sega. This marked the first time Sega was directly involved in the development of a "Sonic" game for a non-Sega platform. The team planned for "Sonic Pocket Adventure" to be a return to the classic 2D gameplay style found in the "Sonic" games on the Sega Genesis. In particular, many game design and visual elements are borrowed from "Sonic 2". The game's background music tracks are also 8-bit renditions of music from "Sonic 3". "Sonic Pocket Adventure" was released first in North America on December 4, 1999. SNK released a system bundle with the game included for the holiday season. The game was released in Japan two weeks later, and in Europe in February 2000.
Sonic the Hedgehog
"Sonic Colors", released in November 2010, expanded further on the "Rush" series gameplay with the addition of the use of "Wisps", which gave Sonic various new power-ups and gimmicks. "Sonic Free Riders" was released in November 2010 as a follow-up to the "Sonic Riders" series, and was developed exclusively for Xbox 360's Kinect system. Later on, "Sega Superstars Tennis" for the Wii, Xbox 360, PlayStation 3, PlayStation 2 and Nintendo DS was released in 2008 and "Sonic & Sega All-Stars Racing" for the Wii, Xbox 360, PlayStation 3, Nintendo DS and PC and iOS was released in 2010, followed by a sequel in 2012.