Batman: Arkham Knight, the fourth entry in Warner Brother's Batman: Arkham series, is based on the same Unreal Engine 3 as its predecessor and an Nvidia-sponsored title. Favoring one camp of GPUs is hardly the least contentious way to launch a new game, however it seems this release would have rattled cages regardless. Countless Nvidia and AMD users have expressed anger about Arkham Knight's performance and stuttering issues. Here's what we found in our tests.