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.
Vectorman
Vectorman is a series of run and gun platform games developed by BlueSky Software and published by Sega for the Sega Mega Drive/Genesis. The first game in the series was released on October 24, 1995 in North America and on November 30, 1995 in Europe. The games have since appeared on several game compilations, including the "Sega Genesis Collection" for the PlayStation 2 and PlayStation Portable, the "Sonic Gems Collection" for the Nintendo GameCube, and "Sonic's Ultimate Genesis Collection" for Xbox 360 and PlayStation 3. "Vectorman" was added to the Wii Virtual Console on February 27, 2007, in Japan and April 5, 2007, in Europe, and in North America on September 22, 2008. It was also released on the digital distribution service Steam as part of the "SEGA Genesis Classics Pack" and as a standalone title. Vectorman was ported to iOS and Android in 2018 as part of the Sega Forever service.