The mission begins inside the Gotham Amusement Park. This deserted park is now under the control of the Joker. The Joker has detained Batgirl's father, Commissioner Gordon, here. Numerous thugs are guarding the park so that no one can enter. Everyone is practicing wearing Joker masks and carrying heavy weapons.
At that moment, Batgirl made a heroic entry to the scene. She just glides down from the sky on one of the thugs and then, one by one knocks out all the other thugs so easily. She was fast like lightning and her punches are strong.
She knew that Joker wasn't alone here, waiting for her. So she called for help but she couldn't ask for help from Batman because if Joker saw Batman, he would kill Batgirl's father. So, she had no choice but to call Robin for help. As soon as those two came in front of the main door, about 10/15 thugs rushed towards them. But Robin and Batgirl were fearless and ready to take down all the thugs.
Those two were excellent fighters. But the funny part is, Batgirl always hits on the leg and she is always under your feet while fighting. But she has speed. She moves so fast and kicks at the enemy's feet. That kick makes the enemy fall to the ground and after that the knockout punch from Batgirl does the rest.
On the other hand, Robin was smashing the faces of the enemy like he was smashing rock with a hammer. Each of his blows was enough to break the teeth of the enemy.
These two have a special combo attack. When Batgirl called for it, Robin took the enemy from her hand and then flew in the mid air and smashed the enemy on the ground from that mid air. It was so much fun using that combo attack. Soon, all the thugs were down on the floor and the path to enter the park was clear.
The path was clear but the door wasn't open. The main gate was locked with some kind of security device. To unlock the gate, Batgirl uses her gadget which is called the Remote Hacking device. Just like Batman, Batgirl also has some cool gadgets. Soon after the gate was open, Joker came on the display around the park, mocking her and Robin for being foolish to come into his cage.
Look at the Amusement park. Just like the place where the madman Joker can make his shelter. The rainy night, thundering in the sky, dark environment around you, and these abandoned, broken but horror place, all these create a full vibe of a movie that you would like to watch over and over.