Welcome to the Complete Achievement Guide for Pact Between Us. This guide is designed to help you unlock every achievement in the game — from childhood milestones and seasonal trips to fashion showcases, emotional story events, contests, and career paths.

I created this guide because Pact Between Us stands out as a truly unique experience—unlike most games, it blends emotional depth with engaging gameplay that’s both fun and rewarding. I was genuinely inspired to write this guide, and here I’ve compiled everything I’ve learned: from achievement classifications to gameplay mechanics and strategic planning.

Achievements are grouped into clear categories so you can easily track your progress, whether you’re aiming for 100% completion or just revisiting your favorite moments. Each category table lists the achievement number, its exact name (as shown on Steam), its category type, and the era of life in which it can be unlocked:

• Preteens (ages 10–11) – early events, childhood outfits, early contest, family moments
  
• Vivacious (ages 12–14) – social expansion, teen fashion, first ambitions, light conflicts
  
• Sirens (ages 15–18) – mature themes, elegant fashion, major conflicts, career goals

And here is the order of the months in this game:
Birthday / Age / A year

1. 6 month: summer
   
2. 7 month: summer
   
3. 8 month: summer
   
4. 9 month: autumn/fall
   
5. 10 month: autumn/fall
   
6. 11 month: autumn/fall
   
7. 12 month: winter
   
8. 1 month: winter
   
9. 2 month: winter
   
10. 3 month: spring
    
11. 4 month: spring
    
12. 5 month: spring

Below are several plans and strategies to help you play this game more efficiently and unlock achievements with minimal repetition.

Stage 1: 1 Session (Setup Phase)

Unlock: Birthday (01-08), Condition (09-15), Trip (16-27), Fashion (28-36), Event (37-45).

• Play this first session casually. All birthday moments and scenes under the Events category will unlock automatically.
  
• To maximize achievement progress, prioritize Practice over Class. This approach helps you earn more money, which is essential for unlocking achievements tied to Fashion purchases and Trip selections.
  
• Choose one month from each Maturity stage and fill all 4 weeks without breaks—this will trigger the Sick Condition achievement.
  
• Unlocking Pact Between Us and Keep Secret is very simple. Even if you only have the final 2 months left in a session (Age 17, Month 3 = 0 love), take a 4-week vacation during those last 2 months. This will automatically max out your sister’s Stamina and Affection (Love) values.

Stage 2: 4–5 Sessions (Focused Progression)

Unlock: Skill (46-53), Contest (54-61).

• Now it’s time to get serious. This stage may take 4 to 5 sessions depending on your choices.
  
• Focus on Contest Wins rather than Career or Max Skill achievements. For example, if aiming for Contest Win: Class [phy], start optimizing your path to win contests in that category.
  
• From Age 10 onward, consistently choose Class [phy] and Practice [phy]. This will allow you to unlock all Contest Win: Class [phy] achievements. It will MAX score at Age 14.
  
• Then, boost secondary skills that aren’t needed for contests but are close to the required scores for Career achievements, for example Acting [act].
  
• With this strategy, you can unlock: 3rd, 5th, and 7th Contest Win: Class [phy], Physique [phy], MAX, Acting [act] MAX
  
• If you also raise other skills that rely on high Physique [phy] scores, you can unlock three career achievements in the same session: Star, Model, and Adventurer (Traveller).
  
• Choose which skills to prioritize based on the career paths you want to unlock.
  
• Try to keep your sister’s Stamina stable throughout these 4–5 sessions—avoid triggering illness if possible.
  
• Once Class and Practice sessions reach Level II or III, avoid placing them side by side in the same month. Always insert a rest week between them. Even if your sister’s Affection and Stamina are still around 40, stacking high-level activities without breaks may trigger negative conditions (she could get sick even the stamina is high, less than 40).

Stage 3: 1 Session (Career Sweep)

Unlock: Career (62-69).

• Unlocking all career goals is easy at this point. You don’t need to memorize every skill requirement—just plan ahead and match the right scores to each career.

By following those strategies, here is what I got:

• I completed the game in 7 sessions, covering the full arc from Age 10 to 18.
  
• Highest final money earned: 758,660.
  
• Approximate playtime: 16 hours, extended to 25 hours due to writing and refining this guide.

To make this guide easier to follow, I’ve grouped all achievements into clear categories based on their theme and progression stage. Each table lists the achievement number, its exact name as shown on Steam, the category it belongs to, and the stage of life in which it can be unlocked. This structure allows you to quickly locate specific achievements, track your progress, and plan your playthrough for 100% completion.

• 🎂 Birthday (01-08)
  
• 💗 Condition (09-15)
  
• 🧳 Trip (16-27)
  
• 👗 Fashion (28-36)
  
• 🎭 Event (37-45)
  
• 🧠 Skill (46-53)
  
• 🏆 Contest (54-61)
  
• 🎓 Career (62-69)

Weilan, our little sister, was born on May 20th under the Taurus sign with AB blood type. Her birthday always falls in the 5th lunar month, during the spring season, in the 3rd week.

Birthdays : Moments That Matter
01 - 11th Birthday - Weilan’s 11th Birthday
02 - 12th Birthday - Weilan’s 12th Birthday
03 - 13th Birthday - Weilan’s 13th Birthday
04 - 14th Birthday - Weilan’s 14th Birthday
05 - 15th Birthday - Weilan’s 15th Birthday
06 - 16th Birthday - Weilan’s 16th Birthday
07 - 17th Birthday - Weilan’s 17th Birthday
08 - 18th Birthday - Weilan’s 18th Birthday

Notes
When a birthday achievement or moment occurs, two key stats are affected:

• Fat (Stamina) instantly increased up to 100 (maximum) regardless of previous value.
  
• Love (Affection) toward her older sibling increases based on her maturity level: Preteens: +10, Vivacious: +20, Sirens: +30

A condition is something that will never happen on its own — it exists only if the player chooses to make it happen. These states, whether good or bad, are shaped entirely by your decisions, and without your intervention, they would never come to pass.

Conditions & It's Triggers
09 – In Debt: When the older brother runs out of money for the first time.
10 – Affection: When Love reaches 100 (maximum).
11 – Sick (Preteens): Sister’s performance to drop to 0 during the Preteens stage.
12 – Sick (Vivacious): Sister’s performance to drop to 0 during the Vivacious stage.
13 – Sick (Sirens): Sister’s performance to drop to 0 during the Sirens stage.
14 – Pact Between Us: When Love reaches 100 at the end of the game at age 18.
15 – Keep Secret: When Love reaches 50 or more at the end of the game at age 18.

Note:

• Sickness suspension: When the sister falls ill, all daily activities are suspended.
  
• Recovery penalty: When she recovers, her Health is restored depending on the stage: Preteens: +30, Vivacious: +35, Sirens: 40. But It will reduce the love affection: Preteens: –10, Vivacious: –15, Sirens: –20. The brother’s finances also reduced depending on the stage: Preteens: –4.000, Vivacious: –6.000, Sirens: –8.000.
  
• Affection requirement for ending unlocks: If the required affection level is not met by the end of the game, neither Pact Between Us nor Keep Secret can not be unlocked.

Trips are more than just seasonal getaways — they’re emotional checkpoints. Each vacation marks a shift in the siblings’ relationship, shaped by the scenery, the timing, and the choices you’ve made. Whether it’s spring’s quiet bloom or summer’s chaotic laughter, these moments are where memories settle and bonds evolve.

Wanderings by Season
16. Summer Trip (Preteens) — Eyes wide with wonder at her first fireworks show.
17. Fall Trip (Preteens) — Admiring the colors of autumn, quietly learning to let go.
18. Winter Trip (Preteens) — Snow falls gently—Christmas feels like magic.
19. Spring Trip (Preteens) — Joy carved into carousel laughter at the amusement park.
20. Summer Trip (Vivacious) — Still too shy to learn swimming, but eager to try.
21. Fall Trip (Vivacious) — Hoping they remembered the telescope—nature feel closer now.
22. Winter Trip (Vivacious) — A warm escape to Thailand, chasing summer in winter.
23. Spring Trip (Vivacious) — A tiring picnic, yet the one they looked forward to most.
24. Summer Trip (Sirens) — Finally brave enough to start learning how to swim.
25. Fall Trip (Sirens) — Her love for museums grows—quiet awe in every hallway.
26. Winter Trip (Sirens) — A luxurious getaway, but something feels distant.
27. Spring Trip (Sirens) — A beautiful dress, chosen just for her—with love, without words.

Note:

• Terminology mismatch: The achievement list uses the term Fall, while in-game dialogue and UI consistently refer to the season as Autumn. Players are advised to treat these as interchangeable until the developer updates the terminology for consistency.
  
• Affection impact: These trips significantly boost the sister’s affection (both Fat and Love), often maxing it out regardless of prior status. They’re emotionally pivotal and mechanically rewarding.
  
• Financial cost: The exact cost per trip is unclear, but based on Winter event screenshots, all happiness-triggering moment can exceed 15.000-35.000 currency in total. Players should plan their budget accordingly, especially in later phases where expenses spike. I think per stage has it's own.

Fashion isn’t just about clothes — it’s about identity. Each outfit reflects a phase, a mood, a silent rebellion or a quiet longing. As the seasons change, so does her style, revealing who she is and who she’s trying to become.

Unlockable Dress Prize List
28 - Floral Sundress - Floral dress (Preteens) : 1.000
29 - Hemitail Dress - Jumpsuit and tailcoat skirt (Preteens) : 2.000
30 - Denim Print Skirt - Printed denim half skirt (Preteens) : 3.000
31 - Plaid Blue Skirt - Blue plaid skirt (Vivacious) : 5.000
32 - Sleeveless Slip Dress - Slip dress (Vivacious) : 8.000
33 - Butterfly Bow Dress - Flying sleeve bow skirt (Vivacious) : 13.000
34 - Strappy Summer Dress - Strapp dress (Sirens) : 21.000
35 - Waist Strap Dress - Suspender high waisted skirt (Sirens) : 34.000
36 - French Polkadot Dress - French polka dot skirt (Sirens) : 55.000

Note:

• Order format: The order of information in the table above follows this format:1) Achievement name, 2) Dress name as shown in-game, 3) Price required to unlock.
  
• Fashion functionality: These dresses are purely fashion and serve no confirmed gameplay function. I’m not sure whether they have any direct connection to the game’s mechanics, but aesthetically, they align very well with the theme of the Victory achievement contest. Whether this is intentional or coincidental remains unclear. I just don't know which.

This event occurs regularly, usually triggered when a new class appears in the Study tab or a new job opens in the Practice tab. It’s a quiet rhythm of growth—predictable, yet meaningful. Everything is in its place.

Moments Worth Remembering
37 - Conference 1 (Preteens) - 10/2/week 1 - First parent-teacher meeting at school.
38 - Lost & Found (Preteens) - 11/6/week 2 - Returning a forgotten bag at the café.
39 - Vase Broken (Preteens) - 11/10/week 3 - Admitting mistake of breaking vase at the shop.
40 - Conference 2 (Vivacious) - 13/2/week 1 - Second parent-teacher meeting at school.
41 - Shoes Delivery (Vivacious) - 14/2/week 2 - Delivering dance shoes to sister during rehearsal.
42 - Framed (Sirens) - 15/9/week 3 - A conflict with a bad customer at the Tea Art Shop.
43 - Bar Incident (Sirens) - 15/2/week 1 - Arguing with the bar manager over a protecting sister.
44 - Debt Fight (Sirens) - 16/2/week 2 - Demanding unpaid wages/salary after completing jobs.
45 - Ring (Sirens) - 17/2/week 3 - Buying a ring as a gift for sister's 18th birthday.

Note:

• Notification Letter: A notification letter typically arrives as a reminder of upcoming events listed above. It is usually sent 3 months to 1 year before the event begins, giving players ample time to prepare and adjust their schedule accordingly.
  
• Memories are saved: Events are automatically saved in Memory within the app. This allows players to revisit key moments, track emotional milestones, and reflect on their journey over time.

Skills are acquired through a balanced integration of classroom learning and applied practice. To fully master each skill, players must reach Level 3 and achieve the highest possible score in all related assessments.

Skills That Shape Your Journey
46 - Knowledge - 🎓 [kno]
47 - Tact - 🌞[con]
48 - Charm - 🩰 [cha]
49 - Elegance - 👑 [elg]
50 - Acting - 🎥[act]
51 - Physique - ⭐ [phy]
52 - Vocal - 🎵 [voc]
53 - Styling - 🕶️ [cos]


Note:

• Group list: The groups listed in the table above do not represent progression tiers. Instead, during a single gameplay session, only certain groups may appear—meaning you'll be developing skills from specific groups while others remain unavailable. Task groups may change when shifting from Vivacious to Sirens—some skills or tasks won’t carry over, so plan ahead.
  
• Sequential Unlocking: Each class and skill unlocks one by one, depending on story progression and character requirements. Not all options are available from the start.
  
• Practice Point Requirements: The first practice session for any skill requires 500 points. Skill refinement (second stage) demands 800–1000 points, depending on the skill’s complexity and relevance.
  
• Career Achievement Trigger: When a class reaches Level 3 and its related skill reaches Level 2 with maximum score in the end of the game (9.999), it will unlock skill achievement. This may grant access to new jobs, emotional milestones, or alternate story paths.

This contest isn’t just a competition—it’s a stage where Weilan's talents shine, a bridge that connects her dreams to the future she is building. Every step she take, every effort she make, is proof that she is growing into someone extraordinary. Keep believing, keep creating, and let her light reach farther than you ever imagined.

What It Takes to Win
54 - 1st Contest Win: Class [cha] | 11 Age - 9 month/week 1 - autumn | Minimum score: 600
55 - 2nd Contest Win: Class [elg] | 11 Age - 2 month/week 2 - winter | Minimum score: 800
56 - 3rd Contest Win: Class [phy] | 12 Age - 9 month/week 1 - autumn | Minimum score: 1.000
57 - 4th Contest Win: Class [voc] | 13 Age - 10 month/week 2 - autumn | Minimum score: 2.500
58 - 5th Contest Win: Class [phy] | 14 Age - 11 month/week 3 - autumn | Minimum score: 4.000
59 - 6th Contest Win: Class [elg] | 15 Age - 11 month/week 1 - autumn | Minimum score: 6.500
60 - 7th Contest Win: Class [phy] | 16 Age - 11 month/week 1 - autumn | Minimum score: 7.500
61 - 8th Contest Win: Class [cha] | 17 Age - 11 month/week 1 - autumn | Minimum score: 8.500

Note:

• Minimal thresholds: The required conditions are set just above the absolute minimum, leaving little room for error or delay. Missing even a single opportunity may result in failure to unlock.
  
• Precision required: Players must manage time, resources, and emotional stats with extreme precision. These achievements are designed to test long-term planning and deep system understanding.
  
• Fat and love affection: Winning or even losing in a contest may influence Fat (Stamina) and Affection (Love) values. Be mindful of your condition before entering.

This is the final journey.

We’ve sacrificed time, energy, and emotion all this time—for one purpose: the success of our beloved little sister.

No matter how difficult the road becomes, we keep moving forward, guided by love and hope.

What We Strive For: Careers & Dreams
62 - Homemaker (OTAKU) - [con] : 1.000
63 - Dancer - [cha] : 4.000, [elg] : 2.000
64 - Teacher - [kno] : 6.000, [con] : 2.000
65 - Attorney (Lawyer) - [kno] : 7.000, [elg] : 3.000, [act] : 1.000
66 - Doctor - [kno] : 3.000, [con] : 7.000
67 - Stars - [act] : 6.000, [phy] : 3.000, [voc] : 5.000, [cos] : 2.000
68 - Model - [cha] : 5.000, [phy] : 6.000, [cos] : 3.000
69 - Adventurer (Traveller) - [kno] : 4.000, [elg] : 4.000, [phy] : 4.000

Note:

• Required Skills: The list above outlines the essential skills needed to pursue each career with it's minimum score. These represent the core competencies players must develop to unlock their chosen career paths or desires.

Thanks for reading!
I’ve created several other guides to help everyone navigate features, settings, and gain full achievements. You’re welcome to check out the full archive, and feel free to share or contribute if you spot something new.
https://gtm.steamproxy.vip/sharedfiles/filedetails/?id=3544159746