Sonic Mania dev confirms they helped with Sonic Origins Plus

Time to have a little more faith

Sonic Origins Plus Impressions – Two Steps Forward, One Step Back - Game Informer

Relive the classic collected adventures of Sonic The Hedgehog, Sonic The Hedgehog 2, Sonic 3 & Knuckles, and Sonic CD in the newly remastered Sonic

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Headcannon Worked on Sonic Origins Plus' Amy Rose and Knuckles

Sonic Origins got help from the Sonic Mania team

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Sonic Mania - first Special Stages gameplay, Bonus Stages and Time Attack revealed

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