along with hints and cheat codes. The compilation features an extensive museum section in which players can view content—such as promotional artwork, videos, screenshots, and remixed music—unlocked after obtaining achievements. Time-limited demos of the Genesis Sonic games and the other six Game Gear games can also be unlocked. In each demo, the player begins in the respective game's final level and can play until the time limit is met. Development Sonic Gems Collection was developed by Sonic Team and published by Sega for the GameCube and PlayStation 2. According to Sonic Team director Yojiro Ogawa, the compilation (and its 2002 predecessor Sonic Mega Collection) was conceived to introduce young players to older games in the Sonic franchise. While Sonic Mega Collection focused on the original Genesis games to showcase what made the franchise a success, Sonic Gems Collection focused on games Sega considered rare and obscure. Although Sonic Team was responsible for Sonic Gems Collections creation, they had limited involvement in the development of the games included on the compilation; for example, Sega AM2 made Sonic the Fighters, and Sonic R was primarily developed by Traveller's Tales. Most of the games included are emulated, but Sonic the Fighters is a port. At the beginning of Gems Collections development, Sonic Team made a list of the most wanted games for the compilation. The team considered the games they felt were high quality in graphics, gameplay, and overall nature. Sonic CD and Vectorman were considered for inclusion in Mega Collection, but were deferred to Gems Collection. Producer Yuji Naka said storage constraints prevented Sonic CD from inclusion in Mega Collection. AM3's SegaSonic the Hedgehog (1993) was omitted due to problems emulating its trackball controls. AM2 assisted in porting Sonic the Fighters, marking its first release on a home console. The Windows versions of Sonic CD and Sonic R were used in Sonic Gems Collection. Both games received visual upgrades: Sonic CDs opening sequence is presented in fullscreen and Sonic R has higher resolution textures. During development, Sonic Team hoped that each region's version of Sonic Gems Collection would be identical in content. However, the Streets of Rage games and Bonanza Bros. had to be omitted from the North American localization, due to fears of a "Teen" rating from the Entertainment Software Rating Board (ESRB). The PAL release was impacted as well. The team also wished to include both the Japanese and North