My favorite map.
STAY ON THE STAGE.
Now im going to attempt to explain something.
Run around the entire stage and get an entire wave following you.
Then, run toward the left (if youre facing the stage) and go in between the boxes and the wall.
And this point, turn around and fire into the mass of zombies following you, but dont use iron sights as this slows you down.
Make sure not to stay there too long cause if you kill one, there is a spawn point directly behind you.
Keep running around the stage in this direction (clockwise if youre facing the stage), dodging zombies and what not, and turn and fire at the same point.
Rinse and repeat until round 60.
EDIT: This will get you a ton of points, so dont forget to PaP some shit.