My zombie plan:
Get as many headshots in as I can, while rebuilding the window barriers.
When I have enough points to move the couch AND buy a BAR, I move upstairs.
Load up on grenades and run from door to window and back.
Shoot the quick ones first.
I stab them in the first few rounds, you can stab them while they are tearing down the barriers.
I don't like upstairs, unless it is just passing thru to the "mystery box" room. That way it makes them easy targets as they file down the stairs (do not open the door!)
If you get the FG42 or MG43 you are in bidness! (The FG42 puts the BAR to shame. It has more power than the MG43, but it shoots so fast you are always reloading it)
p.s. PS3 or Xbox? PS3 for me, EL_Guapo_357 is my name...