Sonic Mania PC version launches with Denuvo, online requirement

Sega says online authentication issue is "being corrected by the dev team."

Denuvo - PCGamingWiki PCGW - bugs, fixes, crashes, mods, guides and improvements for every PC game

Sonic Forces On PC Will Include Denuvo, Persona 5 Costume - Siliconera

Sonic Mania Plus DRM Protection Slowing Down Legitimate Copies - GameRevolution

Sonic Mania - PCGamingWiki PCGW - bugs, fixes, crashes, mods, guides and improvements for every PC game

Updated] Sonic Mania PC Version Is Always Online For Now; Has Denuvo DRM

What do you think of the anti-piracy DRM, Denuvo coming to switch? - Nintendo Switch Forum - Page 1

Steam Community :: Sonic Superstars

Sonic Mania/Bugs - Sonic Retro

TL;DR: Sonic Mania

Sonic Mania fans are angry the PC version uses Denuvo DRM - but at least it can be played offline now