Sonic Jam
"Sonic Jam" is a compilation which contains the four main "Sonic the Hedgehog" games released on the Sega Genesis: "Sonic the Hedgehog", "Sonic the Hedgehog 2", "Sonic the Hedgehog 3", and "Sonic & Knuckles". Unlike future "Sonic" collections, "Sonic Jam" does not use a Genesis emulator; the games are proper ports, and all are nearly identical to the original Sega Genesis releases, with the exception of minor bug fixes. "Sonic Jam" emulates "Sonic & Knuckles" "lock-on technology"—a special feature that allows the player to merge elements of "Sonic & Knuckles" into previous games, resulting in changes to the level design as well as the choice to play as Knuckles the Echidna in "Sonic the Hedgehog 2" and Tails in "Sonic & Knuckles".
Educational games in the Sonic series
As the "Sonic the Hedgehog" series of platform games has grown in popularity, its publisher Sega has expanded the franchise into multiple different genres. Among these are several educational video games designed to appeal to young children. The first attempt to create an educational "Sonic" game was Tiertex Design Studios' "Sonic's Edusoft" for the Master System in late 1991, which was canceled despite having been nearly finished. When Sega launched the Sega Pico in 1994, it released "Sonic the Hedgehog's Gameworld" and "Tails and the Music Maker" for it. Orion Interactive also developed the 1996 Sega PC game "Sonic's Schoolhouse", which used a 3D game engine and had an exceptionally large marketing budget. In the mid-2000s, LeapFrog Enterprises released educational "Sonic" games for its Leapster and LeapFrog Didj.