Mike Bithell (originally of Thomas Is Alone fame) clearly likes his surprise launches. His previous game, the short-but-sweet sci-fi mystery adventure Subsurface Circular launched onto Steam with zero fanfare or warning, but racked up no shortage of praise and awards. Today, its successor – Quarantine Circular – quietly released onto Steam, and it looks similarly great. It’s not quite a sequel, though, more a spiritual successor sharing many of the mechanics and themes of the original, but telling its own, entirely new sci-fi tale.