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When a new update is released toHonkai: Star Rail, there are usually a bunch of new quests for the Trailblazers to enjoy. Some of these quests have a special symbol on the map where you can enter a certain domain multiple times on different difficulties. These quests give you a ton of Stellar Jades for finishing a domain and completing some challenges.
Sealed Sector is one such quest, and you’ll have to go through a bunch of quests to get it in the first place. Once you unlock the quest, you can talk to an NPC called Leonard to embark on the required domains.
Updated July 20, 2025, by Sean Murray:Looking to defeat the Sealed Sector special missions? This guide will walk you through it, step-by-step. We’ve also updated this guide’s formatting to match our current standards and given it more links to other helpful Honkai: Star Rail topics.
How To Unlock Sealed Sector Quest
When you start playing Honkai: Star Rail, you’ll first be in an area called Herta Space Station. Here,you’ll have to fight off a bunch of Antimatter Legion enemies and a Doomsday Beastbefore you can get on the Astral Express to go to another planet. You can start working toward acquiring the Sealed Sector quest after finishing this area’s story.
Once you leave,Arlan willsend you a message saying that he hasn’t thanked you for saving him during the main quest. These messages will lead to him giving you a Companion Mission called Punklorde Mentality. Without spoiling anything, this mission will end in Herta’s Office and a person named Leonard will message you after.
Talk to Leonardjustoutside Herta’s Officeto start this quest and enter the first difficulty.
Sealed Sector Difficulty One Walkthrough
The first difficulty is quite straightforward since Leonard mostly teaches you how everything works in the domain.You’ll spawn in the top right section of the higher floor of Storage Zone. After you finish the dialogue, enter the room beside the one where you spawned. Here, you’ll see graffiti in front and one on your left as you enter.
Scan the Hacking Callcard graffitinear the entrance first to continue the dialogue. Once that ends,you canscan the second graffiti, which will open the door to the next area.
Head directly to the circle in the middle as the bottom right door will be closed with another required graffiti. You won’t be able to open the map in this domain, but you can roughlyhave an idea of the next three graffiti locations using the picture above. Here are the general directions for them:
After acquiring all these items,head back over to the bottom right door and fight a giant Fire monsterto finish the first difficulty and get all the rewards.
Sealed Sector Difficulty Two Walkthrough
The second difficulty will spawn you on the lower floor of the Storage Zone area,right beside the location where Arlan helped you activate a bridge in the main story. Head back toward the Space Anchor and enter the room ahead. You’ll find the firstHacking Callcard graffiti on your right near a window.
Scan the graffitiby getting close to it and clicking a picture when it’s in the frame. Next,enter the small room to your left for the message-like graffiti to open the next door. You’ll have to defeat two Antimatter Legion waves to get this one, and the enemies will start getting tough on this difficulty.
Head outside the newly unlocked door andenter the first area to your left. This is where you had tosolve a long puzzle to get a special chest. As soon as you enter, there’ll be a cutscene where Leonard will tell you that you can scan the level-like graffiti to lower the level of the boss nearby and make them easier to defeat.
Interact with the graffitiand defeat the monster. Once that is done,interact with the mechanism near the boss and go down the slope in front of where the monster was looking. Defeat two Antimatter Legion waves, and you’ll find another Hacking Callcard behind the second enemy on the path.
Defeat another wave of Antimatter Legion after this and head up the slope where you’ll find a mechanism to your left. Activate the mechanism,take another slope higher, and you’ll find the next level-like graffiti to your left. Cross the orange bridge again, activate the mechanism, and cross the white bridge.
You’ll find thethird Hacking Callcardrightabovewhere you foundthe fourth one.
Once you’ve collected the final graffiti,use the mechanismnear it andgo through the white and blue bridgeto enter the boss room.Defeat the enemy to finish the second difficulty.
Sealed Sector Difficulty Three Walkthrough
The third difficulty has another new graffiti that teleports you to different locations. You’ll start at the same place where you ended the second difficulty. Head outside and cross the blue and white bridge to find two waves of enemies. Defeat these waves and activate the mechanism at the edge. You’ll be able to use the slopes to go to the lower level after that.
You’ll find the message-like graffiti to your right after going down two slopes,but you first have to activate the mechanism hidden behind the crates after going down the first slope. Claim the graffiti and defeat the legion enemy to progress. Cross the blue bridge above to find thefirst Hacking Callcard near another enemy.
Exit the room after claiming the first two pieces of graffiti andinteract with the question mark in front to get teleported.
After being teleported, you’ll find thegraffiti to lower the boss' level on one of the sides of Curio holders to your left. Scan the graffiti and defeat the monster blocking your way to continue. Follow the path that was blocked and keep going straight to find another Antimatter Legion monster to defeat.
Once that’s done, you’ll find aquestion mark on the door to teleport you to the other side of the area. As soon as you teleport, you’ll be able to see the final two Hacking Callcards. One will be in the middle while the other one will be in the circle right in front of you on the map.
Finally, you’ll see the second level-like graffiti on thebottom right circle with two waves of Antimatter Legion defending it. Scan the graffiti and defeat the mechanical monster to finish the difficulty.
Sealed Sector Difficulty Four Walkthrough
The fourth difficulty will first take you to the Base Zone area, where you’ll see two Antimatter Legion enemies blocking the next door.You can defeat these enemies first before looking for the required graffiti. Enter the top door after defeating them and you’ll find the first graffiti to your right just beside the door.
Head straight into the final room and you’ll find the message-like graffiti written on one of the walls.You’ll be able to see it as soon as you enter the room. This will open the door that was protected by enemies and you can head out.
In the next area, you’ll have to interact with a mechanism twice to make a bridge so that you can get to the next area.You’ll find a Hacking Callcard on your left once you get there. After getting it, take the slope down and exit the area from your left. Turn right and defeat the Antimatter Legion in front.
Enter the area to your right after defeating the enemies, andyou’ll find another question mark on your right as soon as you enter. Interact with it, and you’ll get the level-like graffiti on the other side. Claim that, and you can head back outside to defeat the mechanical boss enemy. Follow the blue marker to defeat the final boss and finish the difficulty.
You’ll find thethird Hacking Callcardin the same room as the second question mark
