In Honkai: Star Rail, Hidden Codes are part of the Star Hunt event, during which you will have to search for hidden graffiti in various locations. As a reward, you will receive star jade and eternal emoticons, which can then be exchanged for useful items in the event store.
This test consists of three stages. The first one is unlocked immediately, while the other two can only be accessed after completing the Spirit of Panklord companion mission. Below we will show you where all the graffiti are located.
Graffiti in the Base Zone (Issue I)
Three graffiti can be found here. Their approximate location is shown on the map below. Below, we'll go into more detail about where you can find them.
Graffiti 1
Travel to the desired location, turn around and go up the stairs to the second level. You will immediately see graffiti ahead. Interact with it and then scan it to take a photo.
Graffiti 2
Climb down and head east. On the floor next to the reading girl and the stairs you will find a new drawing.
Graffiti 3
Go to the check-in counter and go around the back to see the last painting in this location. Scan it and head to the next area.
Support Area Graffiti (Issue II)
Here you can find three graffiti. Their approximate location is shown on the map below. Below, we'll go into more detail about where you can find them.
Graffiti 1
Immediately after teleporting, run forward towards the train. On the large arch ahead you will see a drawing – take a photo of it.
Graffiti 2
Turn around and run towards the platform exit. To the right of the door you will find another picture.
Graffiti 3
Go back to platform and turn left from the express train. Approach the echo of war and you will find a drawing to the left of it.
Storage Area Graffiti (Issue III)
Here you can find three graffiti. Their approximate location is shown on the map below. Below, we'll go into more detail about where you can find them.
Graffiti 1
After moving to the indicated area, turn right and go to the Shadow Gallery. Here, near Herta's puppet, you can find a drawing on the floor.
Graffiti 2
Exit the room and approach the pedestals with curiosities on the left. Between them on the floor you will find a new picture.
Graffiti 3
Now run to room with curiosities on the other side (north). Once inside, immediately turn right and you will find the last drawing on the wall.
Don't forget to visit the event page later to collect all the rewards. We hope that this information will help you find all the graffiti on the Hertha space station.