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 Spinball
The game has been rereleased on 11 different platforms. The Genesis version of the game has been rereleased on the "Sonic Mega Collection" compilation for the Nintendo GameCube, PlayStation 2, Xbox and PCs, "Sonic's Ultimate Genesis Collection" for the Xbox 360 and PlayStation 3, and multiple iterations of the "Sega Smash Pack" series of compilations. The Game Gear version appears as an unlockable game in "" for the GameCube and PC, as well as "Sonic Gems Collection" for the GameCube and PlayStation 2. The game was intended to be included in the "Sonic Classic Collection" for the Nintendo DS, but was cut for unspecified reasons. The Genesis version was released on the Wii's Virtual Console on March 12, 2007 in North America and April 5, 2007 in Europe. An emulated form of the game was also made available for iOS devices via Apple's App Store in 2010, but was later removed along with other Sega titles in 2015. On September 13, 2010, it was released on Steam.