LEGO Star Wars: The Skywalker Saga

This achievement is a story progression achievement and can only be unlocked once you've completed "Episode VII - The Force Awakens"

From the startup menu, click "Episode VIII - The Last Jedi" (animation of Rey and Kylo Ren fighting in the throne room" and then progress through the episode by completing following story missions.

1. First Order of Business
2. Low Flying Garbage
3. Reap What You Solo
4. Starkiller Queen
5. Destroying Starkiller

With linear achievements like this one, just continue to follow the gold arrows/exclamation points through various adventures and planets. Unfinished missions will have a blue spinning icon on the map. To begin a mission, walk into the blue circle and select start level. Collection of collectibles, studs, minikits, etc. are not required for this achievement to pop.