Hidden challenges are secret doors, locations, and access to other objects within the Soulglad TM Scorchsand area in Honkai Star Rail. To access these areas, you will need to match sounds within the pinball areas of these maps.
How to Unlock Soulglad Scorchsand Hidden Challenges Mode in Honkai Star Rail
To make sure you get Warp Trotter and Lordly Trashcans in Soulglad Scorchsand, you’ll need to unlock hidden challenges for each of the six pinball locations. You will have to go through this area twice, as each of the three areas has two sides and you can only choose one side at a time. The first area, called Dreamplay Fantasia, has an Action side and a Performance side.
Each side has a puzzle that needs to be completed to obtain all the Lordly Trashcans, Warp Trotter, and Treasure Chests in these locations. If you do not complete Hidden Challenges mode, you will not have access to the entire area.
Related: All Pillars of Creation Treasure Chest Locations in Honkai Star Rail
When you jump into the pinball to get to the first area, you will see that Dreamplay Fantasia has two options: Performance and Action. Choose one of these and a round pinball-looking game will appear. Each of these games has three interactive locations, and each of those locations is capable of making several different sounds, depending on how it is positioned.
When these mechanisms are in a specific combination of states and make the appropriate sounds, hidden challenges will be unlocked.
In the bottom right corner of this screen, there will be a button that says Festivals Wiki. If you click here, the menu will appear like the screenshot above and it will have three musical notes. Click on the first musical note to hear the sound you’re trying to match.
Return to the pinball machine and click on that part of the mechanism until it makes a matching sound.
After that, click on the Festival Wiki screen to hear the next screen. Below I posted a YouTube video showing how to match sounds and unlock the location of hidden challenges in Gunfire Time: Time Trial.
You’ll need to do this for each of the six locations in the pinball area, including Dreamplay Fantasia Acting Challenge, Dreamplay Fantasia Action Challenge, Gunfire Time Gunfire Challenge, Gunfire Time Time Trial, Superstar Showdown Arena I, and Superstar Showdown Arena II.
For more information on Honkai Star Rail, check out the Honkai Star Rail Acheron EXP Farming Guide in Pro Gaming Guides.