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 the Hedgehog
While the prior game in the era continued the use of numerous playable characters and play styles, the following games would return to only have Sonic playable. "", an episodic high-definition 2D game akin to the 16-bit Sonic games, was developed for the PlayStation Network, Xbox Live Arcade, WiiWare. "" was released in 2012 for PlayStation Network, Xbox Live, Android, iOS, and Windows Phones. "Sonic Colors", a game for the Wii and Nintendo DS, was released in November 2010. It introduced a power-up system in the form of alien beings called "Wisps". "Sonic Generations" was developed by Sonic Team for Xbox 360, PlayStation 3, PC and Dimps for Nintendo 3DS which was released in November 2011, featuring both modern and classic interpretations of Sonic.