If you picked PC for Batman: Arkham Knight you might have been experiencing some issues. If not, even a brief visit to the Steam store page reveals that users are quite displeased.
Complaints include a capped frame rate (30 fps, but fixable via editing the .ini file), frame rate drops of 10 or more with high end GPUs, crashes, and settings that top out at “high” instead of “ultra.” The optimization issues have led to a “mostly negative” rating on Steam out over over 2,300 user reviews.
Rocksteady has now acknowledged the issues, though no specific timetable for updates has yet been detailed. “We’re aware that some users are reporting performance issues with the PC version of Batman: Arkham Knight,” writes community manager “CODA.” “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.”