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".
Home video game console
To compete with emerging next gen consoles, Nintendo released Donkey Kong Country which could display a wide range of tones (something common in fifth-generation games) by limiting the number of hues onscreen, and Star Fox which used an extra chip inside of the cartridge to display polygon graphics. Sega followed suit, releasing Vectorman and Virtua Racing (the latter of which used the Sega Virtua Processor). Sega also released the 32X, an add-on for the Genesis, while their Sega Saturn was still in development, and announced that they would replace the Genesis with the Neptune, a combination 32X and Genesis, and sell it as a budget console alongside their upcoming Saturn. Despite public statements from Sega claiming that they would continue to support the Genesis/32X throughout the next generation, Sega Enterprises quietly killed the Neptune project and forced Sega of America to abandon the 32X. The 32X's brief and confusing existence damaged public perception of the coming Saturn and Sega as a whole.