Hey:) I have already checked your ME3 walkthrough. Batman AC is not a hard game but there are stuff I have forgotten since I last played Batman AA.
Batman Arkham City Walkthrough
Holy toledo, Batman! Our Batman Arkham City Walkthrough will provide info about gadgets, a storyline guide, and locations of secrets.
Joker Waterways
The Joker has beefed up his security, so the only means of getting back inside is through the waterways under the industrial facility. First toss down your freeze blast grenade to make an ice raft. You'll need to ride rather close to some spinning blades, but if you climb up the ridged panels quickly you will advance shortly before your ride is broken.

The water's currant isn't very strong, so you'll be required to use both the batclaw and line launcher to reach further platforms. About half way through will also be a locked door and a fuse box on the other side. Toss your remote control batarang through the small hole, into the electric wave, and quickly U-turn back to the fuse box.

After your little detour, you'll be back inside the Joker's base. It's the exact same rooms you fought in to recover the REC and rescue the doctor so long ago. This time around there are even more enemies, some with even night vision. Since staying hidden is so important, be sure to take out any enemy that is equipped with special goggles or other devices.

In the next area will be a lone sniper. Use can easily get through by just ducking, but the batclaw disarm is also an excellent means of turning the shooter docile. Soon you'll find Harley Quinn, who can be interrogated to learn about Joker's location. Pursuing the clown prince will lead to the next boss beat down.



