Oddball adventure Catherine is the most successful launch in Atlus' history, the publisher has announced.
Exact numbers haven't been offered but Atlus exec Tim Pivnicny confirmed to IGN that the game had broken the loosely-defined record.
"Catherine has exceeded our highest expectations," he said.
"It released last week to tremendous critical acclaim and fan response, bolstered by the release of a demo a couple weeks prior, and continues to generate discussion among fans for its mature themes, engrossing subject matter, and frantic, challenging gameplay.
"It is fitting, then, that Catherine can boast the largest launch in the 20-year history of Atlus, and continues to see strong sales at retail."
The game, which tells the story of a philanderer who finds himself trapped inside his own nightmares after embarking on an affair with the titular temptress, is due out in Europe on PS3 and Xbox 360 later this year courtesy of Deep Silver.
Eurogamer's John Teti was suitably lovestruck, awarding the US version a doe-eyed 9/10.
"Catherine plays its eccentricities against its more down-to-earth side, which makes for a richer comic world than you might get from bizarro fare alone. The upshot is an experience that's both fun and provocative - a nightmare worth staying awake for," read his Catherine review.