Batman: Arkham Knight

I remember how Batman: Arkham Knight's PC version was a near disaster at launch. Warner Bros. had to temporarily pause its sales while the game was being fixed by Rocksteady and Iron Galaxy Studios (who did the PC port). I can't say that I'm surprised things didn't work out as was meant after playing the game: it is really pushing Unreal Engine 3's capabilities with the sheer amount of stuff that needs to be displayed and streamed -- the map is five times the size of Arkham City's. I can't name any other UE3 game with as huge of a single map.

Batman: Arkham Origins

Batman: Arkham Origins is the only one of the four main Batman: Arkham games not developed by Rocksteady. My theory (and apparently the official story as well) is that Rocksteady needed more than two years to develop the new features of Arkham Knight but Warner Bros. wanted a new Batman game out sooner. Thus WB put their Montreal studio to make Origins which often times feels like a rehashed Arkham City.