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 3D Blast
"Sonic 3D Blast" was released for the Genesis in Europe on November 5, 1996, and the North American version was released on November 7, 1996. The Saturn version was released in Europe on February 13, 1997. The Genesis version was not released in Japan; only the Saturn port was, on October 14, 1999. A port of the Sega Saturn version was released for Microsoft Windows in Europe on September 11, 1997, and worldwide later that year. The game's launch coincided with the release of the similarly-titled Game Gear game "Sonic Blast", which also features pre-rendered 3D graphics.