Each week, a new set of free challenges is available. Every day, at 15 p.m., a challenge will be achievable, with the aim of obtaining ever more rewards. As some will have noticed, the daily challenges are gone. These are replaced by a series of challenges, allowing you to unlock various rewards. Seven in number, they will grant a total of 3500 experience points, 30 battle stars and the Chatastrophic loading screen. Each day, a new challenge will be revealed, until Wednesday, September 5. You can find the list of challenges to complete below, as well as the order in which the rewards will unlock.
Visit Lonely Ledge and Lazy Lagoon in a single match (2)
Search chests in Shifty Shafts or Haunted Hills (7)
Once three of the seven challenges have been completed, you have the possibility of recovering the hidden star of the week, granting you an additional level.