When the game first released on Steam, Arkham Knight was horribly optimized and panned by customers and media alike. The game was taken down and eventually replaced months later.

However, one running joke was that the original buggy game ran at the speed depicted on a speed limit sign in the game's promotional art, which was 30 miles per hour (or 30 fps on most systems). This artwork was changed when the game was re-released on Steam, now showing a 60 miles per hour speed limit and serving as a subtle nod to the game's performance fixes.