8 years ago, Batman Arkham Knight was released, using a very modified version of Unreal Engine 3. It never got a mid-gen patch to go beyond 1080p, nor a new gen patch
Batman Arkham Knight: What We Know So Far | Cinemablend
Batman: Arkham Knight Benchmarked: Graphics & CPU Performance | TechSpot
The Epic Games Store Is Giving Away Six Free Batman Games - The FPS Review
Batman: Arkham Knight publisher gets new big boss | VentureBeat
Gotham Knights mocked for looking worse than 7-year-old Arkham Knight - Dexerto
Here is what a next-generation Batman game could look like in Unreal Engine 4