Devilian

Devilian was an action MMO whose players roamed the world as half human, half devil; the game was later shut down. Devilian lives on as a global Twitch badge, at least in theory: not a single collector on BadgeBase owns it.

How was it earned back then? Nothing survives, neither a campaign window nor an unlock condition. The badge belongs to the early generation of game-bound designs that Twitch never revived.

That leaves it doubly orphaned: the game is history and the badge has no wearer. New badges will not slip past you with the Badge Alert switched on; the silent legends of the past are sorted on the rare list.