Intensive Treatment Lobby - Batman: Arkham Asylum
As you enter the area you get the Riddle: “A puzzle has many sides, but only some are visible.”
As you can see the area is crawling with armed thugs – and there is no real easy step-by-step for this, because you have to take them all down and you cannot afford to let any of them shoot you, because hey, getting shot hurts! There are a few tips you should be aware of – the first is that when you take one of the thugs down, Joker can detect it since they are all wearing collars. So as soon as you take one down, get away from their body, because Joker is going to send the rest of the thugs running towards that location.
Basic strategy here is silent takedowns ninja style, though if you get one of the thugs in an isolated position you can take them out any way you like – just remember to clear the area quickly. Avoid the Gargoyles because the bombs on them have proximity detonation capability – which means they will go off when they sense you. There is a floor-grate ductwork in the control booth you can use strategically – I took three of the thugs out using that.
Once you have them all down, go to the control booth and hack the box that is booby trapped with gas to disable that threat and unlock the two forcefields that lead to the north into the Cell Block Transfer.