Ah, but if you open the cage, you're screwed, you have to open the room upstairs from the stage; not the alley. When THIS is done, you run down the stairs into the cage, then zombies will only come at you from 2 directions, the window, and the stairs (providing you haven't opened the cage to the alley) it does become hazardous if you both end up running out of ammo, since it's near impossible to get up those stairs without ammo; without dying
yes if all the active players are outside, no NEW N6Gas zombies will spawn, this is useful most of which being that all the zombies will be at eye level, (providing you don't have crawlers)