Here is a full walkthrough with the achievements guide for Lust Theory

Note: This walkthrough was created by Kilroy, it is still incomplete and will be updated later.

The Tutorial

While playing the tutorial part of the game you will not have all of the options available that you will have later.

Before you start playing let the whole main menu video play through to earn the AFK achievement.

The game starts off and you get to select your name and your relationships with the three women in the house, two about your age and an older woman. Only relationships where these people shouldn’t be having sex with each other will make sense in the context of the story.

Receive the First step achievement

Press P to activate the Panic screen and earn the Much panic! Such wow! achievement

The game opens with a scene with Nadia.

Receive Sweet dreams achievement.

A car alarm goes off and wakes you from your dream about Nadia.

Jessica comes into your room and tells you to get up.

Press the Angle button to see Jessica from different angles

Earn the Different perspective achievement

Early on in the game you aren’t going to have any real options. You’re going to have a single choice. The more rewarding choice will be presented in

BOLD text

and the less rewarding will be in regular text.

Get up Ignore

Go into the Hall

Go into the Bathroom

Take a shower Brush teeth

Go into the Hall

Go downstairs

Go to the Kitchen

Eat your breakfast

Go to Town

Go to School

No

Enter school

Click on Zoe and Megan

Go to class Sulfuric

High

Sulfate

Vitriol

Burn

Earn Mr. Heisenberg achievement

Go back into the Hallway

Go back to your house

Go into the Living Room

Click on Jessica

Leave her alone

Press the Hints button, you’re going to be doing this a lot for this game.

Go to the Garage

Click on the work bench

Click on the Red button in the upper right when Elizabeth comes in.

Earn the X-Ray achievement and see Elizabeth topless.

Go to the Kitchen

Talk to Megan in the Living Room

Watch TV Go to your room She went out

Go to your room

Go study Continue studying Ignore

Go into the Hall

Go into the Bathroom

Take a shower Brush teeth

Go into the Hall

Go downstairs

Eat Breakfast

Go to Town

Click on the house next to your eight times

Earn the Wrong house, m8! achievement

Go to School

Enter School

Click on Megan and Zoe

Go to class

Go to Classroom

Sulfuric

High

Sulfate

Vitriol

Burn

Go into Hallway

Go into Living Room

Click on Jessica

Go to the Garage

Click on the Work Bench

Go to your room

Click on the bed

Relax

Go into the Hall

Go into the Bathroom

Click on the sink

Click on the sleeping pills

Answer

Go into the Hall

Go into the Bathroom

Take a shower

Go downstairs

Take a shower

Go downstairs

Ignore (Insensitive)

Earn the Douche achievement

Enter School

Talk to Megan and Zoe

Ask Zoe about the party

Try calming the situation down

Go to the Classroom

This is the last time you’ll have to take the Pop Quiz

Sulfuric

High

Sulfate

Vitriol

Burn

Go home

Go to the Living Room

Click on Jessica

Try talking to her some more

Talk some more

Go to Jessica’s room

Click on the laptop

Enter the password

Go to your room

Click on your bed

Go to the Living Room

Click on Megan

Fine

Go to your room

She went on a date

Earn the Snitches get stitches achievement

Slightly open the door

Earn the Perv! Achievement

Earn the Finally free achievement

Click on your phone in the upper left

Click on the Gallery icon

Earn the Pretty Pictures achievement

Press the Hints button

Earn the Where was I? achievement

Now we’re ready to start playing

The Game

Use the Map and go to the Town Map

Go to the School

Click on Ellie

Friendly I’ll think about it

Go into the School

Go into the Classroom

Go into the Hallway

Block (You have to do it before the bar disappears. If you miss you can mouse wheel up to try again)

Earn the Like a ninja, or something achievement

Go to Hallway 2 around the corner

Go into the Bathroom

Talk to Ellie

Go to your room

Use the Fast Forward to get to the next day

Earn the Reset! Achievement

Don’t skip Jessica

You’re right

Go to Jessica’s room

Click on Jessica

Talk

Compliment

Go to Megan’s room

Barge in

Earn the Ever heard of knocking? Achievement

You in a rush?

Go to school

Click on Ellie

Walk up to her

Earn the Creep achievement

Enter school

Enter classroom

Go Home

Go to the Living Room

Click on Jessica

Go to Jessica’s Room

Advance time to Evening

Click on Jessica

I understand

Go to your room

Advance time to Night

Click on the computer

Don’t touch

Advance time to Morning

Go to School

Click on Ellie

Sneak up on her

Enter school

Enter classroom

Go to Bathroom

Click on the Whatever Just Wash Your Hands poster

Earn the Equality achievement

Click on Ellie

I like your outfit

You suck?

Sorry. ‘Meant to say “It sucks”

I like trains. (Like the Block you have to do it before the bar disappears)

Earn the We all do! Achievement

You have to do 20 sit-ups

Go back to Hallway 1

Click on the door to the Teacher’s Lounge

Compliment her

Ellie will show me her boobs

Earn the Honesty pays achievement

Go back to the Bathroom

Click on Ellie

Give her the gun

Pick whichever one you want

Pinch your nipple

or

Squeeze your boobs together

Pick whichever one you want

Bend over

or

Lift your leg on the sink

You’re done with Ellie until you get your Sexual Experience up to 5.

Go Home

Advance the time to Night

Go to Jessica’s Room

Catch her (Another timed selection, do it before the bar disappears)

Advance the time to Morning

Go to School

Enter school

Click on Megan and Zoe

Go into Classroom

Click on Teacher

I don’t like her either

Looks aren’t everything

Wait

Go to Jessica’s Room

Click on the laptop

Try guessing the password

Advance time to Morning

Go to School

Enter school

Click on Megan and Zoe

Try sneaking in closer

Enter the Classroom

Click on Megan

Pick either choice

I heard you and Zoe talking…

or

Err…I thought…

Go home

Go to the Living Room

Click on Jessica

Go to Jessica’s Room

Advance time to Evening

Click on laptop

Advance time to Morning

Click on Answer Zoe

Go to School

Enter school

Enter Classroom

Go to Hallway 2

Enter the Girl’s Locker Room

Don’t assume my gender! (Another timed response)

Earn the Never assume achievement

Wait about 15 seconds until the Spy on Zoe option appears.

Spy on Zoe

Earn the Peeping Tom achievement

Go Home

Go to Jessica’s Room

Click on the Laptop

I found it open

Advance time to Morning

Answer Zoe

Go to Classroom

Go to Girl’s Locker Room

Don’t assume my gender! (Timed response)

Go in

Respond

Advance time to Morning

Recap everything that happened

Answer Zoe

Click on the door to Megan’s Room

Wait about 15 seconds until the Spy on Megan option appears

Spy on Megan

Earn the Peek-a-Boo achievement

Follow Megan

Go to Classroom

Click on Megan

Go to Megan’s Room

Click on Computer

Click on bed

Click on Bookshelf

Go to the Kitchen

Click on Elizabeth

How are you doing?

Thanks to Kilroy for his great guide, all credit to his effort. you can also read the original guide from Steam Community. enjoy the game.

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