Batman: Arkham Knight's Windows PC version should be patched and available for purchase again "at the end of October," a representative from Warner Bros. Interactive Entertainment wrote this week on the game's Steam community page.
The studio expects final fixes to the game, which is no longer available for purchase due to serious performance problems identified after launch, to be complete by the end of the month. At that point, Arkham Knight will again be offered up for purchase and that "support for all [downloadable content] that has been released for the console versions will be in place."
Following serious performance issues, Arkham Knight was removed from the Steam marketplace shortly after its release in June. These included a frame rate locked at 30 frames per second, as well as frequent crashes.
A fix for the PC edition of the game has been in the works since launch. Those who bought it before its removal from the store were later able to apply a patch that aimed to solve several of the major problems, including stabilizing the frame rate and optimizing GPU performance. That patch was made available in August.
Arkham Knight on the PlayStation 4 and Xbox One shipped without the errors that plagued the PC version. Season pass holders of the console game, which we awarded a perfect 10, has received a steady stream of new DLC since launch.