Milky Way Prince is a tragic love story between two individuals that have low self-esteem and mental instabilities. Their toxic relationship is portrayed through fantastical elements but only as a mask for the horrors that lie within them.

The game can run rather long; took 10 hours for me to experiment and reach all the endings, but it could hopefully cut your playtime shorter with this guide. Just be ready to replay the chapters patiently if you want to unlock all the achievements.

I also believe there are multiple ways to reach each ending, but this walkthrough is based on my own gameplay.

You can check the poster (left) in your room to check your progress at the beginning of each chapter.

If there is only one choice, it will not be included in this guide since it follows the story by default.

This playthrough will get you the good ending and 9/13 achievements;
1. BABY’S SKIN
2. DANGEROUS PERFUME
3. BEST PET
4. POSTER LOVER
5. PERSPECTIVES
6. SERIOUS TALK
7. STASIS
8. NOT LIKE THIS
9. FRESH START

Achievements 1-7 missed in this playthrough can be earned in the second playthrough.

Chapter 1 ‘NEBULAS’

Room:
> interact with mirror
> interact with starfish, poster (right) and bathroom
> enter and exit bathroom until blackout occurs
Dialogue:
> Hi?
> Um, are you alright?
> Are you the Milky Way Prince?
> Why are you crying?
> Sometimes I feel alone too.
> Same here, since I was a kid.
> Moreover...
> [SMILE]
> Oh...sure!
Dialogue:
> What’s your name?
> Not a chatterbox, huh?
> Nuki.
> First time drinking milk with a stranger.
> I play the piano.
> Oh it isn’t that difficult.
> Well, yes.
> With myself.
> I’ve got a pet starfish.
> I think so?
> It stares at me.
Transfusion:
> hands
> [Go low]
> tongue
> ears
Dialogue:
> Yeah, it was...marvelous.

Chapter 2 ‘NEW STAR’

Text:
> HELL YEAH OH MY GOD
Room:
> interact with starfish and poster (right)
> [in bathroom] interact with toothbrush and razor
> interact with mirror
> leave [GO TO THE DATE]
Dialogue:
> Hey!
> How are you?
> Oh, what’s your job?
> Wow, that’s sick! So why are we here?
> [CRACK A TOOTHY SMILE]
> ...Great!
Dialogue:
> Damn, it’s so fancy!
> That’s true!
> Order [GAGARIN]
> Summer is finally ending...
> Um...
> You look different than last time!
> You look more confident.
> Yeah, we have so much in common.
> ...I can make you feel that way again.
Transfusion:
> Answer
> nose
> hands
> [Take a deep breath]
> tongue
> [don’t bite it]
Dialogue:
> Why are you crying?
> Sune, you are special.
> I’m not like the others!
> I’ll do whatever it takes to save you!
> I promise!
> I WILL PROTECT AND SAVE YOU FOREVER
Text:
> ☆
> Today was perfect
> [Turn off the phone]

Chapter 3 ‘RED GIANT’

Room:
> interact with starfish, poster (right) and mirror
> [in bathroom] interact with toothbrush and perfume
> leave [GO TO THE BEACH]
Dialogue:
> Thank you for this.
> Well thank you again.
> Oh! Is that your camera?
> You really know a lot about this stuff.
> The sunset’s so melancholic.
> ...”Golden Shower?”
> I prefer the blue hour.
> I’ve been thinking about us lately.
Transfusion:
> Answer
> hands
> tongue
> eyes
Dialogue:
> But...I’m helping...isn’t that right?
> I can help you, trust me!
> You are my prince, I’m your knight!
Text:
> I’m so sorry, Sune...I’m a mess.
> You’re precious...
> [Turn off the phone]

Chapter 4 ‘RED SUPER GIANT’

Text:
> SUNE, I’M COMING
> I’LL BE RIGHT THERE
Room:
> interact with starfish, poster (right) and mirror
> leave [GO NOW]
Dialogue:
> You’re scaring me.
> I got here as soon as possible.
> I’m sorry I took so long.
Transfusion:
> Answer
> hands
> [Ask him]
> [Ok...]
> eyes
> [Ask him]
> [Ok...]
> tongue
Dialogue:
> Hey...
> Why didn’t you answer me before about it the cuts?
> Sune, the cuts.
> Sune, it’s serious.
> It’s serious.
> I think we need to face the problems.
> Sune, you’re hurting me!
> Sune, you’re wrong please!
> Sune...
Text:
> [TEXT HIM]
> I don’t mind if you have problems.
> I’ll never blame you.
> You are not a burden.
> [Play audio]

Chapter 5 ‘SUPERNOVA’

Room:
> interact with starfish, poster (right), mirror and storybook
> wait for Sune to arrive
Dialogue:
> Can we behave like adults?
> It was just a dream!
> [USE J.A.D.E. STONE]
> Sune, calm down!
> Sune, stop!
> [USE J.A.D.E. STONE]
> You need real help, Sune!
> Sune, you’re going too far!
> [USE J.A.D.E. STONE]
> You’re the one diminishing me!
> | NO! |
Transfusion:
> Answer [NOT LIKE THIS]

Chapter 6 ‘NEUTRON STAR’

Room:
> interact with starfish, poster (right) and storybook
> [in bathroom] interact with toothbrush, pills and razor
> interact with mirror and photograph
> leave [GO TO SUNE’S PLACE]
Action:
> interact with telescopes (no specific order)
Transfusion:
> interact with each circle (no specific order)
GOOD ENDING

You can check the poster (left) in your room to check your progress at the beginning of each chapter.

If there is only one choice, it will not be included in this guide since it follows the story by default.

This playthrough will get you the bad ending and 2 of the 4 remaining achievements;
1. FOR YOU, MY LOVE
2. SAVIOR

Chapter 1 ‘NEBULAS’

Room:
> interact with mirror
> interact with starfish, piano, poster (right) and bathroom
> enter and exit bathroom until blackout occurs
Dialogue:
> Do you need help?
> I mean, oh gosh.
> You don’t look...human.
> Are you the Milky Way Prince?
> Sorry, don’t worry.
> Sometimes I feel alone too.
> Same here, since I was a kid.
> Moreover...
> I really can understand you.
> Oh...sure!
Dialogue:
> What’s your name?
> Do you feel better now?
> Do you feel better now?
> Nuki.
> First time drinking milk with a stranger.
> I play the piano.
> I love how the piano sounds too.
> It’s awkward, I know.
> I’ve got a pet starfish.
> I think so?
> It stares at me.
Transfusion:
> nose
> hands
> [Go low]
> eyes
Dialogue:
> Yeah, it was...marvelous.

Chapter 2 ‘NEW STAR’

Text:
> HELL YEAH OH MY GOD
Room:
> interact with piano, starfish and poster (right)
> [in bathroom] interact with toothbrush, razor and perfume
> interact with mirror
> leave [GO TO THE DATE]
Dialogue:
> Hey!
> How are you?
> Oh, what’s your job?
> That’s crazy, any favorite subject or theme?
> Interesting...
> [CRACK A TOOTHY SMILE]
> ...Great!
Dialogue:
> Damn, it’s so fancy!
> That’s true!
> Order [LOST MOON]
> First time here?
> Uh, do you have some bad history?
> Seems like the right place to smoke with a cigarette holder...
> Ehehehe.
> Do you smoke?
> Summer is finally ending.
> Um...
> You look different than last time!
> You look more confident.
> Yeah, we have so much in common.
> ...I can make you feel that way again.
Transfusion:
> Answer
> eyes
> nose
> ears
> hands
Dialogue:
> You don’t have to cry.
> I won’t, I promise!
> No! I really care about you!
> I promise!
> I WILL PROTECT AND SAVE YOU FOREVER
Text:
> ♡
> Today was perfect
> [Turn off the phone]

Chapter 3 ‘RED GIANT’

Room:
> interact with piano, starfish, poster (right) and mirror
> [in bathroom] interact with toothbrush
> leave [GO TO THE BEACH]
Dialogue:
> Your text was...beautiful.
> I would love that.
> Tell me about the Milky Way.
> Do you miss it?
> Oh, is that your camera?
> You really know a lot about this stuff.
> The sunset’s so melancholic.
> ...”Golden Shower?”
> I prefer the blue hour.
> I didn’t shave this time, you see?
> What’s the strangest dream you’ve ever had?
Transfusion:
> Answer
> ears
> tongue
> [Keep it to yourself]
Dialogue:
> [Ask him]
> ...I’m sorry.
> I can help you, trust me!
> Sune, I love you.
Text:
> I’m so sorry, Sune...I’m a mess.
> We’ll handle it together.
> [Turn off the phone]

Chapter 4 ‘RED SUPER GIANT’

Text:
> SUNE, I’M COMING
> I’LL BE RIGHT THERE
Room:
> interact with piano, starfish, poster (right) and mirror
> leave [GO NOW]
Dialogue:
> Are you ok?
> I got here as soon as possible.
> I’m sorry I took so long.
Transfusion:
> Answer
> hands
> [Ask him]
> [Ok...]
> ears
> tongue
Dialogue:
> Hey...
> Love those moth pics!
> [Stay in silence]
> [Cuddle him]
> Sune...
Text:
> [TEXT HIM]
> We’ll handle your problems together.
> I’ll never blame you.
> You are not a burden.
> [Play audio]

Chapter 5 ‘SUPERNOVA’

Room:
> interact with piano, starfish, poster (right), mirror and storybook
> wait for Sune to arrive
Dialogue:
> [USE J.A.D.E. STONE]
> [USE J.A.D.E. STONE]
> [USE J.A.D.E. STONE]
> || I wrote a song for you ||
> [USE J.A.D.E. STONE]
Transfusion:
> eyes
> hands
> ears

Chapter 6 ‘BLACK HOLE’

Room:
> interact with starfish, poster (right) and storybook
> [in bathroom] interact with toothbrush, pills and razor
> interact with mirror and photograph
> leave [GO TO SUNE’S PLACE]
Action:
> interact with boxes (no specific order)
Transfusion:
> interact with each circle (no specific order)
BAD ENDING

You can check the poster (left) in your room to check your progress at the beginning of each chapter.

If there is only one choice, it will not be included in this guide since it follows the story by default.

This playthrough will get you the neutral ending and 1 of the 2 remaining achievements;
1. FULL PICTURE

Chapter 1 ‘NEBULAS’

Room:
> interact with mirror
> interact with bathroom
> enter and exit bathroom until blackout occurs
Dialogue:
> Hi?
> Ah, can I help you?
> Sorry, none of my business.
> Are you the Milky Way Prince?
> Why are you crying?
> Sorry, don’t worry.
> Maybe you’re special.
> [SMILE]
> Oh...sure!
Dialogue:
> What’s your name?
> Not a chatterbox huh?
> Nuki.
> I’ve got a pet starfish.
> I don’t know.
> Um...
> It stares at me.
> I love stars.
Transfusion:
> tongue
> hands
> [Keep touching his neck]
> ears
Dialogue:
> Yeah, it was...marvelous.

Chapter 2 ‘NEW STAR’

Text:
> HELL YEAH OH MY GOD
Room:
> interact with mirror
> leave [GO TO THE DATE]
Dialogue:
> Ahh, you scared the crap out of me!
> Why are we here?
> [CRACK A TOOTHY SMILE]
> ...Great!
Dialogue:
> Maybe too fancy for me
> That’s true!
> Order [ADAM]
> You look different than last time!
> You look more...adult?
> Well...I just ordered what sounded good to me.
> Don’t worry! You just took me by surprised, that’s all.
> ...I can make you feel that way again.
Transfusion:
> Answer
> hands
> tongue
> ears
Dialogue:
> You don’t have to cry.
> I’m not like the other!
> I’ll do whatever it takes to save you!
> I promise!
> I WILL PROTECT AND SAVE YOU FOREVER
Text:
> ☆
> [Turn off the phone]

Chapter 3 ‘RED GIANT’

Room:
> interact with mirror
> leave [GO TO THE BEACH]
Dialogue:
> Thank you for this.
> I really need good summer memories.
> Oh, is that your camera?
> Will you take a picture of me?
> If you don’t mind...that is...
> C’mon, it’s not important, just for fun!
> Don’t underestimate yourself like this.
> What are you talking about?! You’re a star!
> What? I’m sorry, I’m not following...
> The sunset’s so melancholic.
> ...”Golden Shower?”
> I prefer the blue hour.
> I’ve been thinking about us lately.
Transfusion:
> Answer
> hands
> tongue
> ears
Dialogue:
> Sune...stop being so negative.
Text:
> You’re precious...
> [Turn off the phone]

Chapter 4 ‘PLANETARY NEBULA’

Text:
> SUNE, I’M COMING
> I’LL BE RIGHT THERE
Room:
> leave [GO NOW]
Transfusion:
> Answer
> hands
> [Keep it to yourself]
> tongue
> nose
Dialogue:
> What’s behind the door?
> [Stay in silence]
> [Cuddle him]
> Sune...
Text:
> [DO NOT TEXT HIM]
> [Play audio]

Chapter 5 ‘WHITE DWARF’

Room:
> wait for interaction with door
NEUTRAL ENDING

You should only be missing the FULL MENU achievement.

> Replay the game up to Chapter 2
> Order [GANYMEDE] in MOONAGE DAYDREAM
(I suggest finishing the conversation to make sure the progress registers properly.)

> Return to MAIN MENU and replay the game again.
> Order [GEMINI] in MOONAGE DAYDREAM
(Achievement should unlock immediately.)


ACHIEVEMENTS COMPLETE!