On the surface, Eternum is a campus romance simulator, but underneath it's a hell-difficulty maze of choices. Countless veteran players have crashed and burned—one seemingly harmless dialogue can permanently disqualify you from a character's harem route. This ultimate guide covering v0.1 to v0.8 is here to have your back. Every critical choice in every version has been tested hundreds of times. Follow this guide to unlock all characters' perfect endings, all hidden scenes, and special CGs without missing a single one. Say goodbye to save-scumming frustrations and experience the ultimate harem king satisfaction.
Table of Contents
Version 0.1 - Core Character Affection Building
The foundation version where you build initial affection with core characters Annie, Eva, and Dahlia. Mess up any choice and there's no fixing it later.
Annie's Route - Mandatory Choices
Answer the phone, don't hesitate just click it
Let her make the call, this is mandatory
Let them leave, or you won't get later plot
Willing, make your attitude clear
No need for that, refuse decisively
Thinking about what you said, show you care
Be aggressive toward this person, show your stance
Participate, be active in events
Help out, show your kindness
Clean thoroughly, complete the task seriously
Keep hiding, don't show yourself yet
I'm mesmerized by your beauty, compliment her directly
Help her out of trouble, time for the hero save
Katy Perry 1989 8000 miles 1 month and 14 days Demeter 88 days East Timor William Bardot, enter this info accurately
Hug her, don't miss the physical contact
Like it, give affirmation
Praise her pen, details matter
Activate glasses, use the key item
Buy the pendant, invest in the relationship
Look around, explore the environment
Follow Eva, don't lose her
Intervene, get involved in the situation
Go with her, first time it appears
Go with her, second time it appears
When Dahlia calls you a dumbass, click the attack button in the upper right corner, timing must be precise
Stay, don't leave
Go with her, last chance
Eva Route Supplement
Follow Eva all the way, don't run off halfway
Intervene in her personal matters, show your concern
Go with her twice, both are mandatory
Once Annie's route foundation is solid, hidden scenes unlock naturally, and Dahlia's hostile status will turn friendly.
Version 0.2 - Deepening Plot Choices
This version introduces more characters and complex plotlines with Penelope and Luna debuting. Every choice affects future development.
Core Option Flow
Let Annie come along, more people more power
Punch him, solve it with force
That's great I like anime too, find common ground
Buy nothing, after the discount pick any animal you like, this is free choice
Go yourself, independent action
Fastest route: go to foyer → living room → garden → bedroom → hallway → office → bedroom → safe room → open safe → password is 3218
Ask her about the gloves, detail question
Let her sleep in your room, deepen affection
Take it further, don't chicken out
Go help make breakfast, diligent character setup
Help with the performance tickets, be proactive
Invite Noah and Raul, max out social
Help out, continue showing kindness
Pat her head, intimate gesture
Family → hobbies → religion → tattoos, ask in this order
Say something, don't awkward silence
Hug her, be direct
Willing, affirmative answer
Call her, take initiative
Get coffee for Penelope, gain presence
Add 3 spoons of sugar, remember her taste
Take photo at current distance, show proper restraint
Tell Mr. Valentino to fuck off, be badass
Praise her, sweet talk never fails
Open the box yourself, do it personally
After completing this version, you'll find the number of romanceable characters has doubled, with each character having their own dedicated storyline.
Version 0.3 - Critical Multi-Route Development Phase
Version 0.3 is the game's first major watershed moment. Systems like Potioncraft, Summoning, and Dark Magic open up, and choices in each subject affect different characters' affection directions.
Forgive her, be magnanimous
Go save Nova, hero rescue
Have sex with Matt, don't hesitate
Steal Matt's money, robbery
Dahlia's cake or Alex's bread, pick whichever girl you like for +1 affection
Tell her you like her, direct confession
Kiss her, actions speak louder
Shop System Options
Give it a try, though this option doesn't affect plot, purely for experience
Potioncraft Branch
You are special to me, this line must be said
After plot ends, return to shop, then go back to Potioncraft once more to trigger follow-up
Other Subject Choices
Summoning, pick directly
Dark Magic, pick directly
Divination, let Penelope handle it
Claim rewards, don't forget
Restoration Magic, practical skill
Buy apples, item collection
Don't buy, save money
Give him 6 Eternum coins, investment
Make a shocking request, go big
Click dodge → block → attack, combat combo
Spare his life, be merciful
Accept invitation, don't refuse
Will, affirmative answer
Lord of the Rings, this option gives highest affection bonus
After finishing 0.3 you'll basically grasp the game's core rhythm, with each character's affection clearly diverging.
Version 0.4 - Phone System & Side Quest Explosion
Version 0.4's biggest update is the phone chat system. Each character's text replies affect affection, and this version sees a surge in side plots—miss one and you'll lose a hidden scene.
Don't open the letter, respect privacy
Down-to-earth story, this option is safest
Put arm around her shoulder, physical contact
Leave or try your luck, both work
Sit between them, play both sides
Rear view, pick this angle
Give her a small tip, generous character
Play dumb and cooperate, act clueless
Convince her to enter the competition, encourage her
Tell her, be honest
Keep the secret, tight-lipped
Kiss her back, don't chicken out
Reason with him, use logic
Attack, use force
Go find her, take initiative
Will, affirmative answer
Key Phone Chat Replies
Alex: "Of course, how could I forget our first date, baby"—this line skyrockets affection
Dahlia: "You actually came to me with this first"—express surprise
Penelope: "What's up, how can I help my favorite model?" OR "As long as the girl inside looks good, all photos look good"—then pick one you like
Nova: "What a context-specific question"—then pick whatever option you like
Luna: "Really? Of course I'm going" OR "Haha, it's fine your dad is as good as you"
Nancy: "I think you look better without clothes"—sweet talk
Chang: "How can I help?"—then pick either of the first two options
Leap of Faith, pick directly
Interstellar, movie option
Only the Clayton-related option is required for affection, others are optional
Agree, don't refuse
Take the audio playback device, you can click the new icon in the upper right to listen to various audio files
Go find the egg, mission objective
Take the gun, arm yourself
Help Vasir OR help Commander Hassler—no "correct" option here, I recommend experiencing different routes and picking your favorite. This choice may affect future outcomes.
Listen to his final audio record, but not mandatory
"You really look like high society," this compliments her
Talk to Calypso and Mr. Moss before leaving to get 120 Eternum coins
Answer, pick directly
"Sure let's play here," agree to the suggestion
Wrong phone replies directly decrease affection, so memorize these key responses.
Version 0.5 - Party & Texting System
Version 0.5 adds party system and more complex texting interactions. Luna, Nova, and Penny's routes converge here—mess up one choice and the multi-character scenes are gone.
Refuse, be decisive
I fight to protect others, justice character setup
Resist looking, test your willpower
Assign Chang a task too, for fairness
Get in the car, don't dawdle
Sit in the back with Luna, prime position
Game Session Options
"Is this person good looking? She's perfect"—just compliment
Play twice, total 3 possible answers: Raul, Nova, Idriel—each triggers different plot
Put arm around her, intimate gesture
Play dumb and cooperate, keep acting clueless
I like her, direct confession
Send the photo to Annie, share your life
"Am I getting stronger?" ask this question
"Do you speak Spanish?" language topic
"What are your hobbies?" get to know her
"Don't you want to take off your gloves?" then kiss her
Put arm around Luna's waist, physical contact
Go to the altar, scene trigger
Say something, don't awkward silence
Offer her a massage, proactive service
Take it slow, don't be impatient
Complete Text Reply Guide
Luna text: "Sounds great, have fun" OR "Don't pick Fishing Simulator"—both replies work
Nova text: "I'm not going anywhere," express determination
Annie text: "Yes, I took this photo at Luna's this morning" → "Right? I think so too, glad you like it" → "Wow I love it" → "Can't wait to see it, I just hope that photo you just sent was vertical" → "Oh my god"—reply in this exact order
I like it a lot, express directly
Okay, agree
Party Event Options
Chat, be social
First go right and talk to Penny to trigger the beer mini-plot
Then return left and talk to Nova in the cafeteria
Ready to go, respond positively
Let it be OR go to locker room to find Penny
Return to cafeteria, good girl
That blowjob was really amazing, memory flashback
Propose mutual masturbation, bold suggestion
Grab Nova OR make her orgasm, both work—player's choice
Return to Penny's classroom: Truth or Dare → Dare → Underside
Penelope OR Charlotte, both work—don't pick Regina
Help her, continue helping
Talk to Penny in the hall
Be romantic OR be rough—player's choice, affects Penny's future CGs
Thank her for the coffee, be polite
Pretend to be Nancy's kid OR correct her—player's choice, affects Nancy's future dialogue in CGs (the "mommy" dialogue)
Other Destruction Gem holders OR Ulysses' next move OR The Creator—pick whatever info you want to know, results are the same
I also know what I want, firm choice
After this version, your harem is basically formed, each character with their own dedicated plotline.
Version 0.6 - Collector's House & Combat
Version 0.6 adds the massive Collector's House side quest with extremely complex options—one wrong step and you miss hundreds of Eternum coins and hidden CGs. Plus the nickname system opens, your title affects future plot.
Nickname: you can pick any of the three options or choose "other" to customize. This determines your title in Eternum
But the elf princess before me is more beautiful, compliment her
Formal farewell, end politely
Physical OR Magic—corresponding girl gets +1 affection
Flirt, get ambiguous
Collector's House Fastest Route
This section has multiple possible endings, most of which don't affect the harem route. For better gaming experience I recommend playing through once without guide first, talking to everyone each round. However I'll still list the fastest optimal route. Note this route skips many optional dialogues.
Talk to Harley Jones: "Really like it"
Try to open the locked door on the left side of hallway
Talk to Bang
Encourage Bang
Vote, any option
Investigate front desk
Return to locked room and open
Talk to Gemini
Talk to Harley Jones again
Talk to Bang again
Vote: Gemini
Return to locked room and investigate suitcase, password is 1491
Trust her and let her investigate
Talk to Harley Jones again
Pat her head, intimate gesture
Talk to Sister Bac
Give more, be generous
Talk to Bang again
Vote, pick any of first three
Talk to Bang again
Vote, pick either of first two
Collection, pick this
My real family is here, in Creighton, express belonging
Let her set the pace OR test her limits—player's choice, each has different animations
Grilled rib flavor, this taste is most special
"Wait, really? I can come take care of you," respond actively
Buy medicine and blankets, forcefully go see her, action-oriented
Lend Chang $25, loan for affection boost
You both look so beautiful, spread the love
Exchange intel with him, information sharing
Black Ridge Town Events
Dahlia's first time: Rock-paper-scissors, random outcome, keep trying until you win
Calypso: Stay to protect the princess, then tease her
Alex: "Kiss me" then kill him
Dahlia's second time: Go with her
Gertrude OR Charlotte OR Eternum Guard—any choice
Idriel → Mikaela → Dahlia OR Mikaela → Idriel → Dahlia, in either order
Make her orgasm first, 6 times, must complete
Spank her ass, twice
Continue sumata (thigh sex), don't stop
I especially love playing with you, express fondness
Talk about other girls, about Eternum Guard, about your brother—all three topics
Caress her OR let her caress you—player's choice, each has different animations
Version 0.6 content is extremely rich, recommend playing at least twice to experience different branches.
Version 0.7 - Werewolf vs Vampire Branch
Version 0.7 is the game's biggest branching point yet: Werewolf route OR Vampire route. Both lead to harem ending but plot and affection bonuses are completely different. Strongly recommend playing both.
Hug her, just hug
Penny Chat Key
"Wait... can I look at it a few times...?" express anticipation
"Ah, right! Can't wait to play with you," respond positively
Hot cocoa, accept her kindness
Say more, guide her to continue
Hold her hand, intimate gesture
Werewolf or Vampire Branch
Both options work, recommend playing both then picking your favorite. Werewolf increases Luna affection, Vampire increases Penelope affection.
Option 1: Werewolf Route
I missed you, express longing
Accept, don't refuse
Don't drag Luna into this, protect her
Ask every question, complete information gathering
Help werewolves, they'll become allies
Option 2: Vampire Route
Used the Old Memories Reconstructor together, shared experience
Accept, agree to join
She's not my wife yet, clarify relationship
Ask every question
Help vampires, they'll become allies
Option 3: Hunter Route
In the first two options, choose to help hunters—they'll become allies
Old barn, explore location
Stay with her, don't leave
Request blowjob, bold proposal
Luna Chat
Go to sleep without saying goodnight? Impossible, express importance
Just do it, decisive action
Tease her about the underwear, flirt
Get angry at her, emotional outburst
Photo Session
Take photo, all three options work—pick your favorite angle
Respond politely, maintain image
Penny Chat 2
"How could this happen... what happened yesterday?" express concern
"Oh right, I heard modeling is exhausting," be understanding
"Wow, this angle you shot Dahlia from is amazing," praise technique
"Wow, you're so beautiful," direct compliment
Only want the map, insist
Only want the map, keep insisting
Buy Polyjuice Potion, key item
Prove you care about her, show through actions
Version 0.7 has extremely many branches, recommend setting a save point here to easily experience different routes.
Version 0.8 - Final Choices & True Ending
Version 0.8 is currently the latest content involving final plot direction. The options below are spoiler territory. If you haven't played yet, you can wait patiently—reading the guide directly will reduce gaming experience.
Accompany her to the inn, don't let her go alone
Blackheart Redes OR Silverhook Lordi OR Crimson Red—Blackheart Redes adds Nova affection, Silverhook Lordi adds Nancy affection
Don't jump don't jump don't jump—jump off the ship. Say important things three times: DO NOT JUMP
Buy a painting from Modi, support art
Flirt, keep it ambiguous
London Office Fastest Route
This is the fastest completion route, but you might miss some side quests.
Check your computer
Note: Birthday Celebration
Leave
Stand up
Take the right elevator
Reception desk
Take the pill OR refuse—player's choice
Stand up
Take the right elevator
Conference room
Leave office
Check your computer
Note: Read this content
Leave
Stand up
Take the left elevator
Rum Q&A & Final Quests
A dog, Nova affection +1
Some books, Nancy affection +1—other questions don't affect results, ask what you want
I will, firm commitment
Complete Nova OR Nancy's quests, don't delay
It's okay, comfort her
Kiss her, just kiss
Annie: "What happened?" → "Don't worry, we're not in a hurry"
Chang: "Haha, of course bro"
Alex: "I'll go"
Nova: "OMG can I see it?" → "Oh my god" → finally refuse
Orange shirt tucked into skirt with overalls—this outfit has the best feel
Go to zoo to see pandas, date location
Yes, affirmative answer
Kiss her, don't hesitate
Foreplay → Continue foreplay → Pull out, follow this rhythm
Talk to Jerry, plot requirement
Marketplace: leave the left circle for last, this way you can complete all four quests before time runs out
Old man, buy one
Matt, give her 80 Eternum coins
Jerry, kill her
Rescue Jerry, save him last
I love you, final confession
Complete all options across all versions above and the Eternum v0.1-v0.8 perfect harem ending is guaranteed, unlocking all characters and all scenes. If an option doesn't appear, it means you messed up a previous critical choice—reload and try again.
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