What can you do as a free member?

Member benefits illustration

Create your free account today and unlock all our premium features and tools to enhance your gaming experience.

Member benefits illustration

Create your free account today and save articles to your watchlist and get notified when they're updated with new information.

Member benefits illustration

Create your free account today and save your favorite games for quick access later, synced across all your devices.

Member benefits illustration

By creating a Game8 account and logging in, you'll receive instant notifications when someone replies to your posts.

Comment rating feature illustration

By creating a Game8 account and logging in, you can make use of convenient features in the comments section, such as rating and sorting comments.

Premium archive feature illustration

By creating a Game8 account and logging in, you can access Premium articles that are exclusively available to members.

Site Interface

Guest
Free Member
Article Watchlist
Game Bookmarks
Cross-device Sync
Light/Dark Theme Toggle
User Profiles
Direct Feedback
Comment Rating

Game Tools

Guest
Free Member
Interactive Map Access
Interactive Map Pins
Interactive Map Comments
Interactive Map Pins Cross-Device
Check List
Event Choice Checker
Deck Builder Cross-Device
Message Board Notification
Message Board Cross-Device
Build Planner
Stat Calculator
Diagnostic Tool
Weapon/Armor Wishlist

Want more information?Learn more

Honkai: Star Rail

Billboard Investigator Hidden Mission Guide

Add to Watchlist

♦ Latest: Version 3.8 Update
♦ Phase 1: The Dahlia & Firefly
♦ Phase 2: Fugue & Lingsha
♦ Phase 3: Aglaea & Sunday
♦ Events: Chrysos Awoo Championship

Honkai Star Rail - Billboard Investigator Hidden Mission Guide

Billboard Investigator is a hidden mission that can be found at the Clock Studios Theme Park in Honkai: Star Rail. See how to unlock this quest, how to complete it, and all the rewards here.

List of Contents

How to Unlock Billboard Investigator

Investigate the Crime Scene

Billboard Investigator NPC Location
Honkai Star Rail - Billboard Investigator Location
Map View
Honkai Star Rail - Billboard Investigator Overworld
World View

The Billboard Investigator mission can be unlocked by checking out the terrifying crime scene near the Clock Studios Theme Park entrance.

Clock Studios Theme Park Guide

Billboard Investigator Walkthrough

How to Help the Billboard Investigator

Billboard Investigator Walkthrough
1
Honkai Star Rail - Billboard Investigator NPC
After investigating the crime scene. Talk to the Billboard Investigator NPC.
2
Honkai Star Rail - Soda and Popcorn NPCs
Then, interact with the Sodas and Popcorn in the crime scene.
3
Honkai Star Rail - Talk to the Billboard Investigator Again
Talk to the Billboard Investigator again to report your findings. You may reply whatever you want.
4
Honkai Star Rail - Billboard Investigator Message
After a server reset, the Billboard Investigator will send a message to you. Reply to them in order for the hidden mission to end.

Billboard Investigator Rewards

Get the A Variation Named “I” Achievement

Honkai Star Rail - Achievement Unlocked

After completing the Billboard Investigator mission, you will get the achievement called A Variation Named “I” Achievement. Claiming it will reward you with 5 Stellar Jades.

All Achievements Guide

Get a Dreamscape Pass Sticker

Honkai Star Rail - 3... 2... 1... Action Unlocked

The Dreamscape Pass Sticker called 3... 2... 1... Action! will also be unlocked after completing the Billboard Investigator mission. This sticker is under the collection, The Most Absurd Stage.

All Dreamscape Pass Stickers and Rewards

Honkai: Star Rail Related Guides

Honkai Star Rail - Missions

All Missions and Mission Types

All Hidden Mission Guides

Hidden Mission Guides
'39 A Cup of "Coffee" A Grail For Heroes
A Midsummer Night's Dream A Star is Born A Steal of a Deal
A Strange Voice Adios, Bottle All is Fair in Love and War
All-Channel Resonance An Odd Meeting Place Antique Scheme
Balloons Towards Tomorrow Bathe in Golden Blood Beyond Good and Evil
Billboard Investigator Bodybuilder SoulGlad Bonfire and Ash
Bronya's Desk Cast Off Worldly Woes Chirping Secret - Allegory of the Cave
Chirping Secret - Divine Enigma Chirping Secret - Kiss of Time Chirping Secret - Lost Prayers
Chirping Secret - Melodic Chimes of The Ancients Chirping Secret - Path of Pilgrimage Chirping Secret - Rainbow's End
Chirping Secret - The Unseen Steps Chirping Secret - The Westward Ordeal Chirping Secret - Unfinished Business
Chirping Secret - Wisdom in Confinement Chirping Secret: Blemish of Light Chirping Secret: Fleetfoot Paradox
Chirping Secret: Golden Journey Chirping Secret: The System of Four City Vagrant
Clockwork: Arturo Clockwork: Garcia Clockwork: Mr. McCoy
Clockwork: Oksana Cold Dragon Young Disposable
Divination Shop Don't Try This at Home Door to a New World
Dragon in Stealth Draw It Yourself, Pen! Drunk “Little Bird”
Eerie Tales Emanator of Trashcans Embrace Your Long Fingers
Escapee Locations Eternity or a Single Page Fair and Square
False Memories Family Cinema Fast and Family
Fast Are Two Seals First Things First Four Lion's Tails
From Hero to Zero Furiae... Outworld!? Future Waterworld
Galactic Doppelbatter Ghost Actor Quest Goblet of Fire
Hidden Corner Honest Abe Host's Choice
Hound Statues Human, All Too Human I Already Built My Own City
Immortal in a Vase In Search of Lost Wine Insatiable
Is This Real? Jingle Bells Jurassic Garden
Just a Number Just One Passing Martial Tutor Kidnapping for Purchase
King Solomon's Carpet Lā Lá Lǎ Là Land Learned a Lesson...?
Like Rippling Waves at First Sight Little Robots LuckEx
Manhole Melancholic Subdual Memories in a Bottle
Memory Bubble Mole's Hide and Seek Moral Higher Ground
Murmurs of the Long Slumber My Sin Is Ever Before Me Natural Immunity
No Relaunch Required Non-Stop Not All Grapes Make Good Wine
Only Reflection Remains at the Crossroads Origami Cranes Oro, Ace Gambler
Outlander's Anthem Palace Where Wind Dwells Peculiar Glaive
Penacony Car Dealer Penacony Grand Theater Robin Pom-Pom's Troubles
Portrait of Souls Prison Visitation Razor Cake
Rightful Rights Society Rock, Paper, Scissors Searching for Mother
Self-Funded Merch Seven Errors of Cycranes Seven Flowers on a Vine
Shadow Guard's Creed Shattered Curio Silence! The Beating of My Heart!
Sneaky Cycrane Sowing the Sun Spamming SPAM
Starlit Sway in Violet Haze Stars, Silent as Enigmas Starskiff Superstition
Steps Echo in the Valley Strange Voice Student Club Staff Members
Sunday Night Live Suspicious Scroll Take Their Hearts With You
Terrific Mara-Struck and Where to Find Them That Is One Big Balloon The Boulder Town Competitive Eater
The Curtain Never Falls on Balloons The Door is Tougher The Evil Within
The First Step of the Future The Immense, The Minuscule, and Human Awareness The Killer Is Not From This Game
The Legitimate Don Quixote The Mandela Effect The Moon Waxes Beneath Blooming Sakura
The Oldest Fable The Red Flower and the Six Grains The Strange Plant
The Sublime Object of Trade Then a Sapling, Now a Giant Shade Ticker's Vision
Toward the New Ocean Trashy Humor Treasure Chest Guy
Treasure Chest Magician Trojan Age Twilight's Three Heartbeats
Utter Horror Story Wanted Posters Wardance 21-Gun Salute
We Work in the Dark to Serve the Light Welcome to Aedes Elysiae Welcome to the Classroom of Academic Freedom
What Goes Around, Comes Around When Breath Becomes Air Winter City Trap
Woodland Gathering of the Fae World Beyond the Cave Xunsang's Quest
Yesterday Once More Yet the Other Ships Passed Safely

All Hidden Mission Guides

Comment

2 Anonymous Anonymous 9 months

This walkthrough is wrong, there's two ways this mission can be completed: unsuccessful and successful investigation completion (website is only showing the unsuccessful one). So I finally got to this point in the game after not having played HSR for a year and the murderer was actually the film roll victim all along who killed and then proceeded to steal their boss' identity by stuffing his tape inside themself LMFAOOOO

1 Anonymous Anonymous about 1 year

So who was the murderer?! I need closure dammit!

Post (2 Comments)

Author

Honkai: Star Rail Walkthrough Team
This article was created by Game8's elite team of writers and gamers.
    Leave feedback(Login required)
    Please participate in our site
    improvement survey
    01/2026
    Would you assist in
    improving Game8's site?
    ×
    This survey will take about 1 minute.
    Your answers will help us to improve our website.
    We are listening to our users' valuable opinions and discussing how to act on them.
    The information collected through this survey will be used for the purpose of improving our services. In addition, the information will only be disclosed a part of a statistic in a format that will not allow identification of personal information.
    Begin Survey
    Not Now
    ×
    Please rate each item regarding Game8.co's Advertisements.
    Amount of Ads
    Very Dissatisfied
    Somewhat Dissatisfied
    Fine
    Somewhat Satisfied
    Highly Satisfied
    Placement of Ads
    Timing of Ad Display
    Ad Loading Speed
    Safeness of Ads
    Content of Ads
    ×
    Please rate each item regarding Game8.co's Quality of Articles.
    Amount of information
    Very Dissatisfied
    Somewhat Dissatisfied
    Fine
    Somewhat Satisfied
    Highly Satisfied
    Frequency of updates
    Speed of new information
    Accuracy of articles
    Understandibility of articles
    Readability of sentences
    ×
    Please rate each item regarding Game8.co's Usability of the Site.
    Ease of finding information
    Very Dissatisfied
    Somewhat Dissatisfied
    Fine
    Somewhat Satisfied
    Highly Satisfied
    Loading Speed
    Use of Color
    Font Size
    Visibility of Images
    Easy to Understand Layout
    ×
    Please rate each item regarding Game8.co's Message Boards, Comments.
    Ease of Writing
    Very Dissatisfied
    Somewhat Dissatisfied
    Fine
    Somewhat Satisfied
    Highly Satisfied
    Readability
    Ease in Finding Information
    Comment Quality
    Comment Quantity
    Admin Response
    ×
    Please rate each item regarding Game8.co's Site's new design.
    Please rate our site's new design
    Very Dissatisfied
    Somewhat Dissatisfied
    Fine
    Somewhat Satisfied
    Highly Satisfied
    Do you think that the website's design change makes the site easier to use?
    Has the new design made it easier for you to find information on the site?
    Has the new design improved the overall visual appeal of the site?
    How would you rate your overall satisfaction with the new design of the site?
    ×
    How likely are you to recommend Game8 to someone you know?
    Very Unlikely
    0
    1
    2
    3
    4
    5
    6
    7
    8
    9
    10
    Very Likely
    If you have other opinions regarding potential improvement to the website, please share them with us. We would appreciate your honest opinion.
    Note: This is a free response section, so you can proceed without entering anything.
    Note: Please be sure not to enter any kind of personal information into your response.
    ×
    Thank You
    ×
    Thank you for participating in our survey! Your answers will help us to improve the quality of our website and services.
    We hope you continue to make use of Game8.
    Close
    For other opinions or comments, go here.

    Rankings

    Popular Articles
    Message Board
    • We could not find the message board you were looking for.

    Gaming News

    Parasite Mutant Review [Demo] | Chasing the Ghost of Square Enix Past

    Parasite Mutant Review [Demo]

    Popular Games

    Recommended Games

    All rights reserved

    Copyright © 2024 HoYoverse, COGNOSPHERE. All Rights Reserved.

    The copyrights of videos of games used in our content and other intellectual property rights belong to the provider of the game.
    The contents we provide on this site were created personally by members of the Game8 editorial department.
    We refuse the right to reuse or repost content taken without our permission such as data or images to other sites.

    Honkai: Star Rail Walkthrough & Guides Wiki

    Quick Access
    Guide Index

    Tools

    Tier Lists

    Latest News and Updates

    Banner Guides

    Character Guides

    5-Star Characters

    4-Star Characters

    Character by Elements

    Characters by Path

    Beginner Guides

    Mission Guides

    Light Cone Guides

    Light Cones by Rarity

    Light Cone Types

    Relic Guides

    Map Guides

    Item Guides

    Enemies and Bosses Guide

    Cosmetic Guides

    Japanese Walkthrough

    All HoYoverse Wikis