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 Mania
In addition to the standard release, a Sega Genesis-themed collector's edition was also released, containing a 12-inch (30 cm) Sonic statue atop a model Genesis, a game cartridge cast with a golden ring, and a metallic collector's card with a download code for the game. To promote the collector's edition, Sega released a retro-styled infomercial featuring former series art director Kazuyuki Hoshino and social media manager Aaron Webber, based on an American television commercial for "Sonic 2". The music label Data Discs published a vinyl LP featuring the game's original music in late 2017. An expanded soundtrack was released on digital music distribution platforms on January 17, 2018.