Sonic Mania Plus

Sonic Mania Plus is an expanded version of Sonic Mania. It will be released in mid-2018 both physically for the Nintendo Switch, PC, PlayStation 4 and Xbox One, and as downloadable content to digital copies of the original game for all platforms.

New features

 * Mighty the Armadillo and Ray the Flying Squirrel will be featured as playable characters.
 * The Competition Mode will be expanded to allow up to four players.
 * An "Encore Mode" will be added to the game, which will remix the Zones with visual changes.
 * A save and playback function of speedrun attempts.
 * Optimizable difficulty for boss fights.

Promotion
With the announcement of Sonic Mania Plus, a wave of promotional material was announced. Those buying the physical version of Sonic Mania Plus will receive a holographic slip cover, a reversible SEGA Genesis or Sega Mega Drive-themed sleeve (for the United States and Europe, respectively), and a 32-page art book.

Trivia

 * This is the first game that Mighty returns as a playable character since Knuckles' Chaotix in 1995, while Ray has not been playable in any game since his debut in SegaSonic the Hedgehog in 1993.
 * In addition, this is the first 2D sidescroller Sonic game that Ray appears in.
 * Some players accidentally got an unintended patch for Sonic Mania for PlayStation 4 in the UK on April 17, 2018. The patch added transitions to stages that lacked them in the original (such as going from Flying Battery Zone to Press Garden Zone), options to use the No Save mode special abilities, a no time limit mode, a completely redesigned Metal Sonic boss, new menus, and the option to download the Encore DLC (which currently is not functioning).