There is not a lot to explain about these achievements because you get them while playing the game.


Light in the dark

You will receive it almost at the beginning of the game.









Time for a walk

You will get it when you go outside










Universal master key

This achievement will be unlocked after obtaining the boltcutters









Lost and found

Find a box of Christmas decorations










Now she's pretty

Decorate the Christmas tree










Descent down

Open the door to the basement










Fireworks

Get the fireworks










Physics tool

Get a crowbar










Elevator up

Take the elevator the second floor









Dead Man's Gift

Take the gun from the dead policeman










I have a chance

Survive a direct confrontation with a distraught ex
(just run away from the ex-girlfriend to the part where you are suppost to go and you'll get the achievement)







Bonds of past and future

Take the wedding ring

These achievements are obtained depending on which ending you completed the game. The endings in the game depend on the player's choice in the dialogues. There are 4 endings in the game (Good, Normal and 2 bad)

Happily ever after











It is the best of all endings. To get it you need:
1) At the moment in front of the tree, you need to say to Joyce: "Hide somewhere and call the police!"

2) When she calls you in the basement and asks what to do next, tell her: "Keep hiding and try not to make any noise"

3) When she asks if you know the ex-girlfriend, tell the truth

4) When she asks what you were going to give her, tell the ring.




We are together again












1) At the moment in front of the tree, you need to say to Joyce: "Hide somewhere and call the police!"

2) When she calls you in the basement and asks what to do next, tell her: "Keep hiding and try not to make any noise"

3) When she asks if you know the ex-girlfriend, tell the truth

4) When she asks what you were going to give her, refuse to tell her the gift.




Loss

There are only two important choices for this ending:
At the moment in front of the tree, say: "Joyce, you have to leave. Urgent!"

When she calls you in the basement and asks what to do next, tell her not to bandage the wound (if she bandages you won't get the achievement)



Parting

For this ending, you have to be rude to Joyce throughout the game.

1) At the beginning of the game, tell her that you have not planned a gift

2) Once in "her" house, say that there is a mess

3) Also, to get this achievement, Joyce must stay alive

4) In the room with the telescope, you definitely need to lie to her 2 times

5) When you pick up the gun, she will ask you a question, answer: "Seriously, Joyce? Not now.


I can fix her

After putting the ring under the tree starting the scene where she appears, she will call you a few times, just wait, DON’T PRESS THE BIG RED BUTTON (I know it's tempting to push the button, light her up and watch her suffer but just wait), after a few seconds, 2 options will appear on the screen, stay with her or launch the fireworks, choose stay with her.