In this guide I try to guide you to getting all 100 of Sunset's achievements in a single run. A first playthrough will take about 5 hours.

Achievements are sorted first by ones that require an action (almost) everyday, then the rest I've sorted into their respective days.

The game allows you to choose how you perform certain tasks, either warmly (orange) or coldly (blue). Orange improves your relationship, while blue worsens it.

There are a total of 7 achievements based on your relationship level, all but one are rewarded for having a positive relationship. The last one requires a little bit of manipulation, but is knocked out very early on and won't affect your ability to earn the other 6.

Basically, there's no reason to ever choose the blue option outside of a few achievements that require it.

Below are tasks that need to be performed everyday until the related achievement unlocks. I won't be going into detail them on the specific days to save on words.
Just always remember to do everything in this section!

From the very first day, you can start keeping a diary. Sit in your specialised chair to start writing, and wait until the entire entry is finished (Angela will sign off the entry with today's date).
You need to complete 40 entries out of a possible 44 days (I wasn't able to find the chair on the last day).

Raven Venefica has written a guide describing the process in a little more detail, as well as providing chair locations if you are unable to find it.
https://psteamcommunity.yuanyoumao.com/sharedfiles/filedetails/?id=484542269
On the second floor just outside the master bathroom is a calendar you can set to today's date.
Similar to the diary entries, you need to set the calendar on 40 out of a possible 45 days.


uka7777 has written an excellent guide detailing the 47 achievements that are awarded for zooming in on books and records.
https://psteamcommunity.yuanyoumao.com/sharedfiles/filedetails/?id=451178695 I won't go into detail which days has which books, since the guide above has already ordered them chronologically, but I'll remind you below when a day has a collectible record.


Starting the second day Ortega will leave his art book open on a different page. The art book is the big book on the table in the living area, usually by the lamp.
You need to look at it everyday. Angela will comment on the picture when you successfully look at it - the comment will appear as text on the screen.

There is a unique achievement for this day requiring you to end the day with all the lights in the house turned on. rogermorse has written a guide listing all the houses light switches which I suggest you follow:
https://psteamcommunity.yuanyoumao.com/sharedfiles/filedetails/?id=703514029 While you're turning on lights, keep an eye out for other orange tasks (such as unpacking boxes).

By the end of the day you should have performed enough orange tasks for the first relationship achievement:

approaching each other
Angela is interested in Mister Ortega

This is also part 1 of 3 for the "distant acquaintance" achievement.

This is also your final reminder to find the book, get the diary entry, as well as set the calendar.

diary started
Angela has begun keeping a diary.

If you managed to turn on all the lights, as you leave you'll unlock:

lightbringer
Angela has left all the lights on after her first visit to the apartment.


As part 2/3 of the "distant acquaintance" achievement, you want to perform every task with the blue option, your aim is to reduce your relationship back to zero.

Part 1/8 of the entire requiem achievement is possible today. You need to play the record on the stereo. If you are having trouble finding the stereo, Delfar has compiled a list of locations here: https://psteamcommunity.yuanyoumao.com/sharedfiles/filedetails/?id=483903943 You can just play the record and let it continue playing in the background while you do other tasks.

Today is also the first chance to look at Ortega's art book. Remember to do this everyday.

an interest in art
Angela had a look in Ortega's glossy art book.

As part 3/3 of the "distant acquaintance" achievement, you want to continue performing tasks with the blue option until your relationship is back to zero. It shouldn't take more than a few tasks if you did some on the 2nd day.


distant acquaintance
Angela feels very distant from Ortega.

After unlocking the achievement, go back to choosing orange options only unless otherwise specified.
Also, I won't mention the relationship achievements anymore either, as they'll come naturally if you perform all the orange options around the house. Just keep writing on notes and turning on every light switch you see.

Part 2 of 8 of entire requiem is today.


Entire requiem 3 of 8


This is day 5 of setting the calendar, you will unlock:

time keeper
Angela is a good time keeper.

Don't leave early if you have finished performing all the tasks. Stay until 6pm to unlock:

museum attack
Terrorists have attacked the Galería Rosa Luxemburg.


Entire requiem 4 of 8

Record 1 of 6 (scottish bagpipe music played by pipe-major nathan gray)

After completing the day's task, open the mysterious black folder. Then go into the study and decode the encrypted document.

codebreaker
Angela has decoded encrypted documents.


Ortega's art book is closed today.

Records 2,3,4 of 6 are available. Make sure to get these before arranging the records.

Unfold the paper boat in the pool and copy the codes (orange option).

thief
Angela has acquired secret codes.


Don't leave early again and stick around to unlock:

convoy attack
The rebels have attacked a military convoy.


This is day 10 of setting the calendar, you will unlock:

stickler
Angela is a real stickler.

Record 5 of 6 is available.


Nothing special.

Entire requiem 5 of 8

Choose the blue option when tidying the museum plans in the guest bedroom.

heist planner
Angela has taken plans of military control centers.


Ortega's art book is closed today.


Entire requiem 6 of 8

On the piano stool is a note. Reply with the orange option saying you'd like to learn the piano.


This is day 15 of setting the calendar, you will unlock:

office clerk
Angela would make an excellent office clerk.

Learning Piano
Starting today and for the next 10 days (11 days total) you can sit at the piano and learn two songs. Each song has 6 stages of mastery - each stage unlocking a single achievement, totalling 12 achievements. After choosing a song to practice, don't get up until you stop playing and the achievement unlocks, otherwise it won't count.

What I didn't realise when I played the game was that you seem to be able to learn both songs simultaneously (or maybe even several stages a day?), provided you have enough time. Though I wasn't able to test it myself, this means you theoretically can earn all 12 achievements in one playthrough.

Don't worry too much about learning both first stages today, you have plenty of time in the upcoming days.

For the duration of the vacation, Ortega's art book will be closed.

Today is the first day of Ortega's vacation. Place his mail on the dining table to unlock

mail person
Angela has collected Ortega's mail.

Continue doing this until Ortega comes back.

Near where you arranged the records on July 16 and recorded the mix tape on August 29 is a radio you can switch on. Listen to the entire show to unlock

nearly forgotten composer
Angela has listened to Peter Starkweather's entire radio show about Luiz Prieto.


As Ortega is on vacation there won't be any collectible books for the next few days.


Nothing special.


Nothing special.

This is day 20 of setting the calendar, you will unlock:

secretary
Angela is a true secretary.

After placing Ortega's mail on the dining table, take a look at the large A4 envelope:

not welcome home
Angela has noticed a letter for Ortega from divorce attorneys in Monto de Oro.


Nothing special.


Nothing special.


Nothing special.

Nothing special.


This is day 25 of setting the calendar, you will unlock:

project manager
Angela is the project manager here.

Today is also the last day you can learn the piano.

Lastly, stick around until the phone rings and answer it. The phone is in the Wintergarden.

hello?
Angela has received a phone call.


Nothing special.


Normal service is resumed. Ortega's art book will have new art and there will be new books to look at again.

Record 6 of 6 is also available.


Nothing special.

If you've kept up with the art book, you should unlock:

a passion for art
Angela has seen all of the paintings in Ortega's art book.


This is day 30 of setting the calendar, you will unlock:

executive producer
Angela might as well be an executive producer.

The art book is there again with a new work of art, but there's nothing more to be gained from looking at it.


As soon as the day starts, you'll unlock:

war room
Ortega has set up a sort of war room in the seating area.

Today is the final day with books to look at :D


Approach the windows of the wintergarden and wait a bit to unlock:

close encounter
A helicopter hovered way too close to the window.

Nothing special.


Nothing special.


This is day 35 of setting the calendar, you will unlock:

janus
Angela masters time like Janus, looking forward and backward simultaneously.


Nothing special.

Nothing special.


Go to the master dressing room (from the master bedroom) to find a shrine where you can place a photo of you and your brother. Do so and light the candles to unlock:

mourning the brother
Angela has lit a candle for David.


When deciding to telecopy which documents, choose the blue option and telecopy the military coordinates.

informant
Angela has sent target coordinates to the neighboring state.


This is day 40 of setting the calendar, you will unlock:

chronos
Angela has become chronos, god of time.

Likewise, this is day 40 of diary entries:

diary complete
Angela has filled all the pages in her diary.

Entire requiem 7 of 8

Approach the windows of the wintergarden to start the bombings. As you leave the wintergarden, you should hear a massive explosion and unlock:

nearby hit
A building just across the river was hit.

As I mentioned in the beginning, you still have 4 more opportunities to write in your diary and 5 more chances to set the calendar. These are completely optional now (or may just save you if you forgot a few days).

Nothing special.


As soon as the day starts, you'll unlock:

the master's voice
Angela has heard president Miraflores speak on television.

Approach the wintergarden windows (or might be time sensitive) to trigger:

palace attack
Missiles have been fired at the presidential palace.


Use the blue option with the newspaper on the desk in the war room:

traitor
Angela has burned the flag of The Empire.

Again, use the blue option with the note on the dining table:

anarchist
Angela has helped Ortega threaten the president.


Entire requiem 8 of 8

the entire requiem
Angela has heard all movements in Luiz Prieto's Requiem.


As soon as the day starts, you'll unlock:

the love of ortega
Angela has spent the night in the Master Bedroom.

Head downstairs to the kitchen and make coffee:

morning coffee
Angela has made coffee in the kitchen on the last morning in the penthouse.

Finally, walk to the harden for the ending credits.

Now is the time to check if you are missing any achievements.

There are two ways you can return to the first day.

1. Choose to restart the game from the pause menu
   
2. Choose to delete your data restart the game from the options menu

Skipping days in both options works the same, you don't need to do any tasks. As soon as the level loads, you can exit immediately and load the next day.

Special thanks to all the people who all provided resources that were super useful:
Raven Venefica
uka7777
rogermorse
Delfar