(Reposted here from the bugs thread...) To restore their menace value from the days before monster perception, opening a zoo should immediately alert every monster within. It's an event, one that changes the game music too, so I think overriding the normal stealth mechanic makes sense here. Also, every monster that is associated with the zoo countdown should stay in the alert state permanently, so the only way for them to go passive again is if the player gives up on the zoo reward (change floors, use PD, etc).
It seems to do that already, to an extent; whenever I enter a zoo, around half the monsters become aware. Sadly, they don't stay aware, but I would like to see this happen.
i approve on the whole zoo to be aggro,its very annoying to hunt down the last remaining monster because it teleported away to some other room -.-
Like Giygas said, all the zoo becomes aware of you the moment you open the door but since you need to fight your way to the core, and most of the time step back to gain a more favorable position, the monster that are in the deep part of the zoo become neutral again :/ They should stay alerted as Giygas suggested.
