LEGO Batman 3: Beyond Gotham

This can only be done on the Lantern planet Oa. Oa will unlock collecting 30 Gold Bricks and you will need to have completed at least one Lantern level in the main game as well as unlocked the Moon Base. To get to Oa, go out of the Moon Base door and fly up and turn around, fly north and it should be a green Lantern portal. Build it and enter. Or, if you have Oa already unlocked, you can just fast travel to the planet by selecting it from the map by pressing .

Once there, go to the pink vehicle selector on the right and select Harley Quinn's Motorcycle. You can be any character for this achievement. Just pick one of the floor car races; the best is the straight ahead in front of the vehicle selector. You can do these races at any time even if you have already beaten them once. Complete the race and the achievement unlocks entering the finish line.

Harley Quinn’s Motorcycle is included with The Squad pack. Once you have access to the Lantern planet Oa (refer to “One Giant Leap for (Bat)Man-kind” in the main guide for more information), travel to it through the Moon Base or select it from the Watchtower Control Room globe. Once you arrive, walk over to the purple vehicle selector machine directly in front of you. Access it, select Harley’s motorcycle and drive to any vehicle race starting point (it is recommended you select the one directly in front of you as the checkpoints are far apart and doesn’t require sharp turns). Complete the race in the allotted time and the achievement will unlock.