Whichever way you choose i will do my best to provide help to make things easier. (This is just a helpful tip for one part of the motorcycle section in Act II. Helpful Tip: Have the Host choose casual, and the second player choose Inconceivable when the game loads up. Doing this will of course mean you have to run through the campaign another time where you switch roles with your partner so you can both get the achievement but you'll end up spending less time then doing it on Inconceivable only. This way the person on casual can go do all the work while the other person sits back and stays safe. When playing coop one person can choose their difficulty as casual and the other person can play on Inconceivable.
Method 2: The same casual coop method can be used here as well. This would be extremely difficult and a challenge id imagine only few would attempt and have the patience to complete. Unlock Inconceivable Difficulty for Campaign by beating the Campaign on Insane.' That’s because surviving on Inconceivable is all about effectiveness - weapons and crates drop significantly less ammunition, so you’ll have to make every shot count with whatever pickups you can find on the battlefield. 'Inconceivable takes a more Survival based twist, giving you less health than Insane difficulty but also less health to your enemies.
