Rocksteady says it is working hard to fix serious issues with the PC version of Batman: Arkham Knight.
Complaints include stuttering, wildly variable frame rates, crashes, and memory leaks, and are affecting both Nvidia and AMD users, although the latter appear to suffering more.
"We're aware that some users are reporting performance issues with the PC version of Batman: Arkham Knight," said Rocksteady on the game’s official forums.
"This is something that Rocksteady takes very seriously. We are working closely with our external PC development partner to make sure these issues get resolved as quickly as possible.
"We'll update this thread when we've got more info to share."
The press were only supplied console review codes, but Rock Paper Shotgun has posted some footage of the game’s PC version in action: