Hey guys! My friend and I managed to earn many trophies/achievments for the BB DLC by only playing Arena D! This Arena is the easiest to survive in. Since the Zombies always drop medkits and money, you don't need ANY of that stuff.
- Just find the stairs in arena D (For better progress find the stairs next to a repair bench) and sit at the top of them.
- Kill every zombies passing by, since there are no Rams it should be pretty easy.
- After each wave has finished, go and collect all the Money/Med-Kits that were dropped and repair your weapon.
Hopefully these tips are as helpful to you as they were to me.
BTW: My friend and I got to wave 32, on the first night of the release, by doing this:)
Oh and if you're playing Co-Op, there are 2 sets of stairs so groups of 2 can be at each. If you're playing with just 2 people, stay at the stairs near the work bench and the zombies can't come up behind you!
How could I forget that map is in the dark!?
The best tip I can give you on flashlight usage is to take turns. One person uses their flashlight until the it needs to recharged and then another person uses their's until it needs to recharged. Keep doing this until you've finished.