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".
Sonic 3D Blast
"Sonic 3D Blast" was the final "Sonic the Hedgehog" game produced for the Sega Genesis, and was developed as a swan song for the system. Sega had discontinued official support for the Genesis in 1995, but intended to produce the game for the 16-bit console because games typically sell for one to two years after their platforms' discontinuation. The game's basic concept was conceived by members of Sonic Team during the development of "Sonic the Hedgehog 3", but most of the programming was done by the British studio Traveller's Tales because Sonic Team was developing "Nights into Dreams". According to founder Jon Burton, Traveller's Tales had just finished developing a "Toy Story" game and wanted to start developing games for 32-bit systems such as the Saturn and PlayStation. Sega, impressed with their work on "Toy Story" and "Mickey Mania", approached them with "3D Blast"; as "Sonic" was extremely popular at the time, the concept "got [their] attention". In retrospect, Burton stated that he believed the game was commissioned because "Sonic X-treme", in development for the Saturn at the time, was struggling, and Sega wanted to bring Sonic into the 3D era of gaming.