Stuck on Mission 13: Firefly in LEGO Batman: Legacy of the Dark Knight? This complete walkthrough guides you through every step of the Knight at the Museum mission – from Batgirl’s Hackarang tutorial to fuelling the rocket in the Space Exhibition. You’ll also find every collectible location, including all 5 Spaceships, 5 WayneTech Caches, and the Red Brick: Fire Breather.
Related Guides:
Mission 12: Poison Ivy
LEGO Batman: Legacy of the Dark Knight Hub
All Collectibles in Mission 13: Firefly
Every mission rewards a yellow Skill Brick at the end.
How to Replay a Mission
In case you didn’t find all collectibles in the first story playthrough, don’t worry. You can still get it. Play the story to Mission 6: Shreck’s Department Store, where you restore the Batcave.
Then, travel to the Batcave and interact with the computer at the top, next to the red batphone. Here you can select the mission you would like to play again.
You will also see the status. If the box is ticked: Congratulations, you’ve found all the collectibles in this mission. If not, there is still work to be done!
Batcave Trophy: Spaceships
Find and destroy 5 Spaceships in Firefly, Mission 13, to receive the Batcave Trophy: Spaceships. Each adds up to the total of 170 Trophy Collectibles. Therefore, you will have 5 of 170 Trophy Collectibles after destroying all five Spaceships
Here’s where they are:
Red Brick: Fire Breather
Before entering the code to reach the last room of the mission, the Space exhibition, head to the planetary exhibition to the right. Turn all four planetary displays to Mars, the red planet. The globe in the center will open to release the Red Brick.
WayneTech Caches
There are five WayneTech Caches hidden in Mission 13: Firefly. Here’s where:
Knight at the Museum – Mission 13: Firefly Start
Open the Security Door
The mission starts with a tutorial for Batgirl’s Hackarang. It can be thrown to control machines and other technology. Throw it at the door panel to start the hacking minigame. Move the yellow bat to the center to override the controls. Then you can raise the shutters.
Save 3 Partygoers
Save the partygoers straight ahead by throwing a Hackarang at the whale controls. Then, move the whale to the left and “Spray Water” on the fire.
The second partygoer to be saved is on the upper left of the room, trapped behind the fire. Use Batgirl’s Hackarang to hack the crab hanging from the ceiling. Move it over to the partygoer and grab them.
To serve the last partygoers, look for the mammoth exhibit behind them. There is a yellow plug for Batman’s Bat Claw. Pull on it to remove the cover of the mammoth controls. Use Batgirl’s Hackerrang to hack the mammoth, saving the last of the three partygoers. The story continues with Batman and Batgirl investigating the banging on the door, where Firefly emerges, disappearing into the now broken ceiling.
Follow & Find Firefly
Batgirl’s Drone is introduced. It can transform into a grapple point – useful when having to grapple greater heights. Summon the drone and fly it up through the silver stud diamond and transform it into a grapple point. Now you can grapple up through the hole in the ceiling.
After grabbing the WayneTech Cache, move the drone over to the blocked passage in the center of the silver stud diamond to transform it into a grapple. Now the two heroes can cross and move to the next room.
Save the Partygoers
In this room, there are three partygoers hanging from a cage. Let them hang for now and go for the collectibles first.
To save the partygoers hanging from the cage, summon the drone and fly it to the diamond-shaped studs. If the drone breaks in front of the ship, move to the tiled floor areas to summon it. Create a grapple point next to the ship to board it. At the top deck is a box with a padlock that can be destroyed.
Drop down into the hole to retrieve the Ship’s Wheel. Stand on the brown button to exit. Use it to save the partygoers. From the pieces on the deck, build a cannon and use it to blow open the door on the other side. Keep shooting at LEGO objects to harvest studs.
Find Firefly
Firefly is behind the door but escapes again. Follow them to the next room, where the floor is lava. Summon the drone with Batgirl to build a perch point, where the diamond-shaped silver studs are, to reach the other side.
Use the bridge to cross over to the other side, then build another drone-perch point to reach the exit going to the gift shop. Firefly is waiting at the gift shop’s exit.
Find a Way to Open the Door
The door to the Space Exhibition closes behind Firefly, them escaping again! Before following blindly, have a look around.
The terminal next to the space exhibition door requires a code. Summon Batgirl’s drone and fly inside the ticket office to scan the pinboard at the back. You will learn the code. Enter it in the terminal to open the door.
Fuel the Rocket
Enter the Space exhibition to find Firefly.
To fuel the rocket, grapple across to the left, where the fuel sign is. Use Batgirl’s Hackarang to get access to the control wheel. Use it to fuel the rocket.
Grapple over to Mission Control and use a drone’s perch point to get inside. Inside is a lever you can pull to activate the rocket controls. Return to the entrance to press the button.
Rewards
Completing Mission 13: Firefly, grants:
-> 1 Skill Brick (Yellow Brick)
Suits Collectibles:
-> 1x Batman (Gotham by Gaslight)
-> 2x Batgirl (The New Batman Adventures & Batman: The Animated Series)
Vehicle Collectible:
-> 1x Batman (Gotham by Gaslight)
-> 2x Batgirl (The New Batman Adventures & Batman: The Animated Series)
Additional Collectibles:
-> Batcave Trophy: Spaceships
-> Red Brick: Fire Breather
-> 5 WayneTech Caches
More LEGO Batman: Legacy of the Dark Knight Guides
Mission 9: Joker 100% – LEGO Batman Legacy Walkthrough
100% walkthrough for Mission 9: Joker in LEGO Batman: Legacy of the Dark Knight. Covers all 3 balloo…
About LEGO Batman: Legacy of the Dark Knight
Release: May 22nd, 2026
Developer: TT Games
Publisher: Warner Bros. Games
Official Website: https://legobatmangame.com/






















































