This is a big fight with probably 20+ enemies. It's a hugely simple fight though with no real diversity. In fact, you could probably make it through this fight by just attacking and suffer only one or two hits. Once you've cleared the room of the small fries, you'll have to deal with a Titan. This is a little bit easier than in AA. You don't have to play chicken, you just have to execute a three hit stun and then you can attack the Titan freely. Once you've done enough damage, you can get on his back and ride him. He has a charge attack and ground pound attack. Use him to do as much damage to the group of small enemies that has joined you. Eventually you will get bucked off, at which point I cleared the rest of the smaller enemies. They are weak and will go down fast. Once they are gone, you can finish up on the Titan fairly quickly.
After Penguin departs, head towards the gate under the stairs. You will need to throw a baterang over or through (it's possible) the fence on the right to hit a button on the wall. I found it was actually easier to try and throw the baterang through a gap in the fence than over it because the angle coming back down was too steep. This will open a gate under the left set of steps. Go through it and almost directly ahead of you will be a lift. Run and hop over the fence to get inside and then shoot the generator to go up. At the top you want to spray some explosive gel on the ceiling. Go down, detonate, go back up and climb out of the elevator.
