100% Achievement Guide | Harold Halibut

Harold Halibut is a handcrafted narrative game that delves into themes of friendship and life aboard a city-sized spaceship submerged in an alien ocean.

About

Harold Halibut is an immersive, story-driven game where you play as Harold, the lab handyman, performing daily tasks alongside his professor, Mareaux. You'll check your objectives from a notepad, and after completing the main tasks, the day ends, leading to a new sub-chapter. To avoid missing any achievements, make sure to talk to everyone each day, as rushing through the game and skipping conversations can result in missing side quests and objectives.

The game does not have difficulty settings, and after completing it, you can revisit any chapter from the load option in the pause screen. However, progress does not carry over when you load a previous chapter; everything, including collectibles, resets to that chapter. This also affects the total playtime, so if you have played for 10 hours and load Chapter 1, your game time resets to zero. If you're aiming for the Slow Bro achievement, which requires 15+ hours of playtime, leave the game running until you earn the achievement, then proceed to complete the epilogue.

Main Story

These are story related achievements that you are guaranteed to get while playing the game.


A Slice of Life
Complete Chapter 1


The Adventure Begins
Complete Chapter 2


A New Shape of Soul
Complete Chapter 3


Cultural Liaison
Complete Chapter 4


Chasing Dragons
Complete Chapter 5


Justice Is a Dish Best Served Warm
Complete Chapter 6


Tubular!
Make your first trip on the All Water tube


Home Is Where the Heart Is
Complete the game

Time Based Achievements

These achievements are cumulative and can be earned over multiple sessions within the same save file. However, using the chapter select feature will overwrite your current save (the game only has one save file), so you'll need to play from the selected chapter until the end again. You can let Harold stand or watch TV during your playthrough, and the timer will continue to count up until you earn the achievement.


Slow Bro
Enjoy the game at a leasurely pace (more than 15 hours play time.)


The Plot Thickens
Watch TV for 10 minutes


A Winner Is You!
Play Rapid Fly Zone Force for 2 Minutes

Collectibles | Missable Achievements by Chapter

Here is a comprehensive list of all the activities and side quests that can be missed in the game. Refer to the chapters below to see each achievement and the timing for completing them before progressing to a new day.

Forschergeist
Complete the Notebook

Harold writes his diaries by drawing his day's major events, so every time you interact with someone and discuss something new, Harold will draw it in his notebook. You can check each drawing Harold does when opening the PDA.

There are 71 notes to collect in the game, some of which are story-related while others are missable if you don't talk to the right person before the day ends. You can replay chapters from the start menu and load a sub-chapter. However, if you reload a checkpoint, your collection will reset to that point, and you'll need to replay the game until the Epilogue to collect all the notes again in the subsequent chapters.

Chapter 1.1

Notebook Entries

All Water Secretary Office
Story-related, can't be missed [All Water District]

Achievements

Rebel
Attempt to leave the All Water Office 3 times

NOTE! This achievement can be missed if you stay next to Felix (the kid). Instead, try to leave the room three times until the achievement unlocks. If you miss this opportunity, you must reload Chapter 1.1 and attempt to leave the room three times, as the save file will overwrite your current progress when using Chapter Select.

At the start of the game, Harold is detained until someone pays his overdue fine in the All Water District. Instead of moving to the right side of the screen to sit and wait, go left to the exit door.

Secretary 17 will notice your attempt to leave and warn you. Repeat this three times to be deemed a rebel.

Chapter 1.2

Notebook Entries

The Lightkeepers
Story-related, can't be missed [Lab District]


Chris in the Lounge
Talk to Chris before using the tube [Lab District]


Fish Dinner
Feed the fish with food from Cyrus [Lab District]


Buoy Announcement
Story-related, can't be missed [Lab District]

Chapter 1.3

Notebook Entries

The Brothers
Talk to Secretary 24, 8, 17 [Agora Arcade, Central Station, All Water District]


Rafi Zelters
Talk to Rafi in the Arcade Store [Agora Arcade]


The Run
Agree to participate in the marathon [Agora Arcade]


Fish Fish Fish Hut
Talk to the fish restaurant [Agora Arcade]


Skiing
Talk to Slippie inside his store [Agora Arcade]


Stranger Danger
Talk to the small blonde girl [Central Station]


Rock Theft
Story-related, can't be missed [Agora Arcade]


3D Printer Shock
Story-related, can't be missed [Lab District]


CEO Casselchop
Story-related, can't be missed [Lab District]


Coco
Talk to Captain Zoya after meeting Madam CEO [All Water District]


The Package
Story-related, can't be missed [Lab District]

Achievements

Certificate of Participation
Participate in the station jog

NOTE! This achievement can be missed if you refuse to participate in the run or don't interact with Buddy in the Agora District. Buddy returns to his Post Office in Chapter 2.1.

When you visit the Agora Arcade, talk to Buddy (the Post Office guy) standing at the far right of the Arcade next to the Theater (stage). He will ask you to wait for Chris to arrive, and when Chris shows up, both will insist you jog with them.

Managing Upwards
Update Mareaux about every step of the search for the Blue Rock

NOTE! This achievement can be missed if you complete two activities without returning to the lab to report to the professor. For example, if you visit Brigitte and Tommy in Steps 3 and 4, then meet Cyrus in Step 6, Harold will only report his conversation with Cyrus, missing out on reporting the conversation with Tommy, thus making the achievement missable. You'll need to replay Chapter 1.3 and report all details to Mareaux again.

The chapter begins with the task of searching for the blue rock. Whenever there's an update on this task, return to the Lab District and report it to Professor Mareaux, even if it's not necessary for unlocking the achievement.

1. Talk to Tommy in the bar in the Agora District about the blue rock (main task)
   
2. Return to the Lab District and talk with Professor Mareaux (1st Report)
   
3. See Brigitte in the Energy District (main task)
   
4. Return to Tommy in the bar in the Agora District again
   
5. Return to the Lab District and talk with Professor Mareaux (2nd Report)
   
6. Talk to Cyrus in the Energy District (main task)
   
7. Return to the Lab District and deliver Cyrus's message (3rd Report)

Après Ski
Try out Slippie's ski slope

NOTE! This achievement is missable if you don't talk to Slippe in his store during Chapters 1.3, 1.4, and 1.5. He leaves the store starting in Chapter 2, so you'll need to reload Chapter 1.3 if you miss this.

In Agora Arcade, you'll find Slippe's store door open. When he shows you his new commercial, he will offer you a chance to test his new half-pipe experience.

Busybody - Part 1
Listen to all of the gossip at Gertrude's Bierzone

NOTE! This achievement is missable because the couples will gossip about a new topic with each announcement in the game. Be sure to visit the bar in Agora Arcade during the chapters listed below to hear each piece of gossip. If you miss any gossip, you'll need to reload that chapter and listen to all the gossip again from that checkpoint.

You can hear gossip from the two people sitting in the bar in Agora Arcade. Go to the bar and wait for them to share all their gossip in each of the chapters listed. Stay there until they finish their conversation for it to count.

• When you visit the Agora District, the couples will be in the bar talking about the announcement.
  
• When you complete the task (Check on Brigitte), return to Tommy, and the couples will discuss Filter Franky.

Family Ties (And Uniforms) - Part 1
Untangle the story of the brothers

NOTE! This achievement is missable if you don't collect the notes from the four brothers in each chapter. If you miss one, you'll need to reload the chapter and restart your progress until the Epilogue for the achievement to count. Using chapter select will overwrite your current save (the game has only one save file), requiring you to play from the chapter select until the end again.

In this game, the secretary brothers are quadruplets, but only three work as secretaries on the Fedora ship. Talk to them in the chapters listed below to learn about their fourth brother and their commonalities.

(Learning about the Fourth Brother)
Speak with Secretary 17 in the Agora District first, then go to Secretary 8 in the Central Office, who will direct you to Secretary 24 in the All Water Office. After talking to each of them once, return to Secretary 17 in the Agora District, and then visit Secretary 8 again in the Central Office.

Entertainment Onat Fan Club - Part 1
Watch Onat's stage performance

Onat will be seated in the theater next to the Arcade Store in Agora Arcade. When you speak with him, he will mention a new stage performance he's preparing based on a book he discovered on Planet Earth.

O Captain! My Captain! - Part 1
Support Captain-at-large Zoya during all walks of life

NOTE! This achievement is missable if you didn't check Captain-at-large Zoya's status daily during Chapter 2. If you complete Chapter 2 without checking on him, you'll need to reload Chapter 2.1 and complete both Chapter 2.1 and Chapter 2.2 for the achievement to count.

• Captain-at-large Zoya is in the "All Water Office" red room to the left. There is a button next to the door. Talk to him about the announcement to gauge his reaction.

Chapter 1.4

Notebook Entries

Cyrus Plan
Talk to Cyrus [Energy District]


Countdown
Story-related, can't be missed [Lab District]

Achievements

Busybody - Part 2
Listen to all of the gossip at Gertrude's Bierzone

• Visit the Bar in the Agora District at the beginning of the day, and the couple will discuss the leak.

Neo-Luddite
Try to pick up the sample directly from Brigitte

NOTE! This achievement is missable if you return to the lab after receiving a message from Brigitte that the samples are ready. Instead, visit the Energy District before heading back to the lab to avoid missing this achievement.

At the start of Chapter 1.4, take the blue rock to Brigitte in the Energy District and assist her with another rock sample analysis. Afterward, move on to another task, such as cleaning the filters in the Lab District, and you will receive a message from Brigitte.

Head back to the Energy District and talk to Brigitte again. She will tell you she sent it to the lab and will unlock this achievement .

Chapter 1.5

Notebook Entries

The Scout and Agent Haroldson
Story-related, can't be missed [Agora Arcade]


Tea with Mareaux
Talk to Chris before using the tube [Lab District]

Chapter 2.1

Notebook Entries

Secret Guest
Story-related, can't be missed [Lab District]


The Announcer
Interact with the Bathroom in the second room [Social District]


Water Wieners
Talk to Warren [Agora Arcade]


Quick Soap Colorfish
Talk to the owner of the soup soup [Agora Arcade]


The Brothers
Talk to all secretaries after Warren [Agora Arcade, Central Station, All Water District.]


Coping Captain
Talk to Captain Zoya in different areas [Agora Arcade, Central Station]


Graffiti
Clean the graffiti on the wall twice [Lab District]


Buddy
Talk to Buddy and read a letter to them [Utility District]


Mysterious Door
Interact with the door upstairs [Utility District]

Achievements

Rubadubdub
Listen to the Announcer under the shower

NOTE! This achievement is missable if you don't visit the announcer's room in Chapter 2.1. Be sure to visit his room before starting the last task in the chapter, "Bring the blood replacement to Fishy."

In Chapter 2, the Social District will now be accessible via the All Water tube. Head there and go to the rooms on the far right side of the area. In the second room, you can interact with the bathroom inside.

Family Ties (And Uniforms) - Part 2
Untangle the story of the brothers

(Warren Returns)
Talk to Warren when he arrives in Agora Arcade, then talk to the other brothers about how they feel about Warren's return. Secretary 17 at the Agora Arcade entrance, Secretary 8 at Central Station, and Secretary 24 in the All Water Office. Then, return to Warren and share their feedback.

Entertainment Onat Fan Club - Part 2
Watch Onat's stage performance

• Visit Agora Arcade and go to the theatre; you will find Onat performing on stage there, and subsequently unlock the achievement .

O Captain! My Captain! - Part 2
Support Captain-at-large Zoya during all walks of life

• Captain-at-large Zoya is playing Rapid Fly Zone Force in the Arcade area in the Agora District. Talk to him about his feelings for not being able to pilot the ship.
  
• When you leave the Agora District, Captain Zoya will then message you, so return to Agora District, and he will be sitting in the bar. He will tell you he no longer feels sad and doesn't care.

The Postman Always Rings Twice - Part 1
Read and deliver all of Buddy's letters

Buddy is the Post Office worker you’ll meet in Chapter 1 in the Agora District. Look at the Certificate of Participation, but you must visit him at the Energy District Post Office in Chapter 2.1 to start reading old undelivered letters with him. This list includes letters you can read with Buddy before you begin delivering letters on their behalf.

On the second day, you can take a break from reading letters or read a second letter on the same day.

In this chapter make sure to read - Ama's Love Letter

Chapter 2.2

Notebook Entries

Bacteria Party
Help Brigitte a second time [Social District]
Note: You can’t help Brigitte a 2nd time until after you’ve given Fishy her medication from Sunny.

Achievements

Family Ties (And Uniforms) - Part 3
Untangle the story of the brothers

(Talk to Warren)
On a New Day, go to the Agora District and talk to Warren. He will explain the different flavor profiles and offer lighter options.

O Captain! My Captain! - Part 3
Support Captain-at-large Zoya during all walks of life

• On a New Day, go to Central Station. Zoya will be sitting in front of the All Water Tubes. Talk to him about his new freedom.
  
• Progress further in the story and Captain Zoya will send you a message and invite you to dinner at Agora Arcade. Go talk to him at the Soup Shop on the upper-right side of the Arcade and he will thank you for being there when he needed a friend to listen.

The Postman Always Rings Twice - Part 2
Read and deliver all of Buddy's letters

In this chapter make sure to read - Adilah Letter & Cease and Desist All Water Corp. Letter

Chapter 2.3

Notebook Entries

Dinner with Brigitte
Story-related, can't be missed [Agora Arcade]

Achievements

The Postman Always Rings Twice - Part 3
Read and deliver all of Buddy's letters

In this chapter make sure to read - Viv Letter

The next part of this achievement will only start in Chapter 4.1. So for now you can forget about Buddy.

Chapter 2.4

Notebook Entries

Rouge Bacteria
Story-related, can't be missed [Lab District]


Catching Coco
Story-related, can't be missed [Lab District]

Achievements

Busybody - Part 3
Listen to all of the gossip at Gertrude's Bierzone

• After the car ride in the ventilation system, the couples will visit the bar in the Agora District and discuss the relaunch presentation.

Chapter 2.6

Notebook Entries

Submarine
Story-related, can't be missed [Lab District]

Chapter 3

Notebook Entries

The Cave
Story-related, can't be missed [Flumylym Cave]


Didachik
Talk to the Flumylym at the first booth/store [Flumylym Cave]


Bubble Guy
Talk to the Flumylym at the store on the right [Flumylym Cave]


The Pyramid
Talk to the Flumylym at the triangle-shape [Flumylym Cave]


Don't Touch
Talk to the Flumylym ahead on the left [Flumylym Cave]


The Ritual
Story-related, can't be missed [Flumylym Cave]


Lunch Break at the Pond
Story-related, can't be missed [Flumylym Cave]


The Crack
Story-related, can't be missed [Flumylym Cave]


Reading
Story-related, can't be missed [Flumylym Cave]


Sneaker
Story-related, can't be missed [Flumylym Cave]

Chapter 4.2

Notebook Entries

Tubylym
Talk to the Flumylym [Central Station]


Sunny's Cupcakes
Visit Sunny's shop [Agora Arcade]


Coffee
Talk to the Flumylym in the Soup Shop [Agora Arcade]


AW Tourism Booth
Talk to Secretary 17 [Flumylym Cave]


Major and Frank
Talk to Major [Flumylym Cave]


Brigitte and the Kids
Story-related, can't be missed [Flumylym Cave]


Cyrus in the little room
Story-related, can't be missed [Lab District]


Plane Race
Talk to Chris after delivering all of Buddy's letters [Social District]


Filter Frankie
Story-related, can't be missed [Lab District]


I am a Lightkeeper
Story-related, can't be missed [Utility District]

Achievements

The Postman Always Rings Twice - Part 4
Read and deliver all of Buddy's letters

Following Buddy's death in Chapter 4.1, he will leave you a box of letters to read and deliver. Once you pick up the letter from your room, you can find the next recipient by checking the optional tasks in the PDA.

NOTE! You can deliver these letters at any time during Chapter 4, but be sure to do so before starting the "Join the Gang" task in Chapter 4.3 to avoid missing the achievement.

• Chapter 4.2: Deliver a letter to Mareaux in the Lab District
  
• Chapter 4.2: Deliver a letter to Zoya in the All Water District

Busybody - Part 4
Listen to all of the gossip at Gertrude's Bierzone

• When the Flumylym joins the Fedora after building the All Water Tube to Flumylym Cave, visit the bard in the Agora District, and the couples will discuss Sunny's new cupcakes.

Exchanger Arranger
Talk with everyone about the exchange

NOTE! This achievement is missable if you don't talk to the people listed below in Chapter 4.2. Ensure you speak to everyone before starting the "Join the Gang" task in Chapter 4.3.

Once people on the Fedora learn about the new alien's cave, they will collaborate to exchange knowledge and resources. Talk to the individuals listed below to hear their thoughts on the exchange. This side quest takes place before the final preparation, so make sure to talk to everyone before the next story-related cutscene.

1. Talk to the two Flumylym in the Central Station looking at the map (Reward: Tubylym Note)
   
2. Talk to Sunny in Agora Arcade (Reward: Sunny's Cupcake)
   
3. Talk to Warren in Agora Arcade
   
4. Talk to the 2 Flumylym in the Upper Soup Color Fish Cafe in Agora Arcade. (Reward: Coffee)
   
5. Talk to Tommy in the bar in Agora Arcade
   
6. Talk to Sunny again after talking to Warren.
   
7. Talk to Chris (school teacher) in the Social District
   
8. Talk to Secretary 17 in Flumylym Cave
   
9. Talk to Warren again after talking to Sunny twice in Flumylym Cave.
   
10. Talk to Major in Flumylym Cave.

Luke Warm
Help Slippie set up in the Energy District

After you talk to Brigitte in Flumylym Cave, she will ask you to find the missing adaptor. Go to the Energy District and speak to Slippie. Ask him about the missing adaptor, then help him set it up in the Energy District to unlock the achievement.

Insider Trading
Convince Warren to move Water Wieners to the Cave

Sunny sets up her new booth in the Agora District to sell her cupcakes, but her sales are struggling because Water Wieners is selling wieners next to her. Talk to Sunny, and she will ask you to convince Warren to relocate as a side quest (optional quest).

In the same area to the right, talk to Warren, and he will agree to relocate to the Cave to discover new flavors. Return and report back to Sunny.

Chapter 4.3

Notebook Entries

Dizzy Fish
Story-related, can't be missed [Flumylym Cave]


Singing Particles
Story-related, can't be missed [Lab District]


Energy Container
Story-related, can't be missed [Lab District]

Achievements

The Postman Always Rings Twice - Part 5
Read and deliver all of Buddy's letters

• Chapter 4.3: Deliver a letter to Brigitte in the Flumylym Cave.
  
• Chapter 4.3: Deliver a letter to Rafi in the Agora District
  
• Chapter 4.3: Deliver a letter to Chris in the Social District
  
• Chapter 4.3: Deliver a letter to Major in the Flumylym Cave

After delivering the previous letters, the final letter will be for you, and Buddy will have one last request: go to the Social District and ask Chris to help fulfill Buddy's final wish.

Busybody - Part 5
Listen to all of the gossip at Gertrude's Bierzone

• After completing the heist in Chapter 4.2, visit the bar in the Agora District, and the couple will discuss the exchange business.

Chapter 4.4

Notebook Entries

Barbershop Brothers
Talk to the brothers gathered together [Agora Arcade]


Green Thumb Class
Story-related, can't be missed [Social District]

Achievements

Family Ties (And Uniforms) - Part 4
Untangle the story of the brothers

(A Cappella)
At the beginning of Chapter 4.4, you will get a new task to go to Pee. There, you will meet Secretary 24. After checking on him, a new optional task will appear (A Cappella): visit the four brothers in Agora Arcade near the theatre.

Chapter 5

Notebook Entries

Chasing the Dragon
Story-related, can't be missed [Flumylym Cave]

Chapter 6.2

Notebook Entries

The New Submarine
Story-related, can't be missed [Fedora Ship]


Frozen Fedora
Story-related, can't be missed [Fedora Ship]


The Core
Story-related, can't be missed [Fedora Ship]


Submarine Duo
Story-related, can't be missed [Fedora Ship]


Showdown
Story-related, can't be missed [Fedora Ship]


Finding the CEO
Story-related, can't be missed [Fedora Ship]

Epilogue

Notebook Entries

Ancient Onat
Talk to Onat on stage [Agora Arcade]


Hot Dog Contest
Talk to the four brothers, then to Warren again [Agora Arcade]


Frank Jr.
Talk to Major [Social District]


Captain Zoya
Talk to Captain Zoya [All Water District]


Same Old
Talk to Madam CEO in her office [All Water District]

Achievements

Family Ties (And Uniforms) - Part 5
Untangle the story of the brothers

(Warrens Gourmet)
Talk to the four brothers standing in the Agora Arcade and return when they finish fighting. Visit the area again, and Warren will stand alone; talk to him.

[Z.MAN]

Hi, just ran through this game following the above guide. Here's some feedback:
- 20 (Tea with Mareaux) - This autotriggers as part of the story after having tea with Mareaux, and has nothing to do with Chris or the tube. (Chris is in the shower when you exit the vent)
- 25 (The Brothers) - This only triggers if you talk to Warren again after talking to all the secretaries
- 27 (Graffiti) - This is not a Notebook item, but instead it is a separate Achievement
- 30 (Bacteria Party) - Brigette is in the Energy District, not the Social District

But thanks for the guide, it was very clear and helped me find my missing Notebook item!

[Mentat]

Thanks for updating the guide! I think there should be a Busybody - Part 5 for Day 2 of Chapter 4.2. On day 1 the couple day about Sunny's cupcakes, and on day two the couple talk about what happened the day before. Right after that, the achievement unlocked for me. Might be worth adding that to the guide.

Regardless, thanks again for the guide.

[sadcat.jpg]

I have added a note under Chapter 2.2 as suggested by Mentat below, thank you!

[Mentat]

Just a heads-up for others, in Chapter 2.2, you can’t help Brigitte a 2nd time until after you’ve given the fish guy his medication from Sunny. It would be helpful to update the guide to reflect this, as I ended up backtracking a bit wondering why she wasn’t asking for help.