Bug: The Ashlands: There is a hole in the ground towards the back with the climbable wall that leads down into the water below. There is a bug that causes the Abysmal Riders to spawn a new set every time you climb back up out of that hole. So each time you go down and climb back up, 2 to 4 of these enemies will spawn out in the desert close by and start riding around in circles. You can continue to jump down the hole and climb back out causing more and more to spawn creating an army of Abysmal Riders out there which you can then lead into a cave to farm XP and souls off.
Trivia: The Apocalypse/Mayhem: During the cut scene where you see Abaddon and before you fight Straga, there is a moment when a Minion Demon tackles an Angel out of the sky next to a billboard on a building. If you look closely at that sign, there are various names on it. These names are people who are part of the Darksiders' development team. Names including John Tran, Howard Tang, Bri Thatcher, Nick Southam, Chris Doerr, Jeremy Robins, Pedro Seminario, and more.