This page has info on the Free Tier from the 5th week of the Blockbuster Challenges in Fortnite Battle Royale.
Instructions
You can only find this free battlestar after unlocking the Showdown Loading Screen.
This is done by completing three Blockbuster Challenges which entails completing all Weekly Challenges of any five weeks in Season 4.
Puzzle
This is the Showdown Loading Screen for reference:
There is a battle taking place, but look at the graffiti in the background...
Solution
There is a red crab spray painted on the brick wall in the background. A battlestar is seen spraypainted above the crab.
The spot is found on top of the huge crab strucuture at the south of Moisty Mire.
See screenshots and maps below to help find the location of the secret battlestar.
Screenshot
Map
Strategy Guide/Tips
- You can only locate the week 5 star after you have unlocked the Showdown Load Screen.