Sonic Mania Plus Announced - Siliconera

In Summer 2018, Sonic Mania Plus will be released. It will add Mighty and Ray as playable characters, as well as 4-player multiplayer and an Encore Mode.

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Sonic Mania Plus coming this summer with new characters, physical

Screw This Game - Sonic Origins Modder Halts Development On

Sonic Mania Plus first developer diary: 'Art and Design' - Gematsu

Sonic Mania Tops 1 Million Units Sold Worldwide

Sonic Mania » SEGAbits - #1 Source for SEGA News

Sonic Mania Adventures' Fifth And Final Episode Released - Siliconera

sonic mania plus » SEGAbits - #1 Source for SEGA News

Sega - Sonic The Hedgehog., Page 12

Sonic Mania Plus to Get a Physical Release, Adds New Game+, Extra