Infiltrate the BPD’s Basement
In the lobby you’ll be greeted by 8 more cops, one of which has a shield. You’ll have to take them out hand-to-hand. On the right side of the door you came in will be an electrical panel, which you can use for an environmental takedown if you lure an officer to it. Dispose of them and take the elevator into the BPD’s basement.
It isn’t long after entering the elevator that the officer’s attempt to sabotage it, causing it to stop between floors. No worries, simply leap up through the elevator’s roof and detonate the wall right in front of you. From here, drop down to the bottom of the shaft and climb into the vent. After a little chat with the Penguin on Harley’s radio you’ll exit out into the BPD’s basement. You’re almost there!
The basement is just like the control room you were in earlier. There are two floors, plenty of grates and ledges, and about 9 cops to deal with. The one difference here is that Ivy has left behind several cop-eating plants that can and will devour the your enemies should you aggravate them when the officers pass by. Do this at least once to watch the violent spectacle.
Deal with the cops however you see fit, but try and save your Mayhem Mode for the next area. After you’ve taken care of all 9 cops you’ll have to walk through two sets of double doors on the bottom floor of the basement where you’ll see, at long last, Poison Ivy!
