The view from the targeting scope of the heavy cannon does not match what it looks like outside.
The 'Previously on The Ancient Gods: Part 1 -' text states that Immora is the capitol city of Hell; this use of the word 'capitol' is incorrect, 'capital' being the correct term.
The Heavy Assault Rifle uses full metal jacket rounds, yet the rounds seem to explode, which full metal jacket rounds don't do.
The Prætor Suit does not have good arm protection.
The amount of overgrowth seen in the overgrown city can only happen over several decades. There has not been long enough for this to happen since the dæmonic invasion began.
Despite being abandoned, the city still has power and even gas.
Some of the Sentinel forces in the background seem to have failed to notice enemy forces nearby and have moved past them.