Continuity mistake: The Apocalypse/Mayhem: Just before the first battle with Straga, you walk down a street where there is a large hole in the road filled with lava and some Angels are fighting some Minion Demons. On the other side of the hole, there is nobody. But once the cut scene starts on an angel in the sky, he swoops down towards that spot and suddenly Abaddon and another Angel Soldier appear standing on the far end of the hole.
Other mistake: The Apocalypse/Mayhem: Right as the cut scene starts where you meet Abaddon, there are three Angels on screen. The one standing on a building is just looking around, and right before the one hovering by the camera starts to swoop down, the one standing on the building turns his staff towards a diction, charges a shot and fires... Only he's shooting at nothing for no apparent reason. There are no demons or humans visible that direction, and only distant buildings down the street far out of his range. So he's just animated to shoot randomly down the street at nothing.
Other mistake: The Apocalypses/Mayhem: If before heading down the road where you meet Straga, you pick up a car and then go down there, the cut scene introducing Abaddon and Uriel still plays. War looks normal walking up and talking with nothing in his hand. But as soon as the cut scene ends, you will be standing there now holding the car above War's head once more. And considering that right after this cut scene, you have your first encounter with Straga, and his weakness at this point is throwing cars at him, this allows you to get an early hit on him right off the bat by throwing the car as soon as the cut scene ends, before he ever hits the ground to cause cars to rain from the sky for you to use.
Revealing mistake: The Apocalypse/Mayhem: During this level, meteors are constantly falling down to the earth. A lot of items in the environment are destructible, including all vehicles seen. However, if a meteor strikes a vehicle, like a bus, it does nothing to it. But rather passes right through the bus and just leaves an impact crater under it.
