Hi everyone, this is Mari, the writer/programmer of Zero-Sum Heart!

Thank you for playing the game, and here's a little guide to help you with collecting achievements (spoilers ahead!):

Impulses: Give in to intrusive thoughts

• When taking your heart out of the chest, choose "squeeze", and then "squeeze harder".

The Bolter: Run from your problems (twice)

• In the courtyard, choose "Leave, right now."
  
• In the same playthrough, when confronted with Bear in the Classroom, choose "Run. Right now."

Cherry Chapstick Lips: Kiss a girl

• When talking to Mushroom in the infirmary, choose "Kiss Her".

Desire for Knowledge: Get caught reading smut in the library

• Unlocks automatically

Untimely Curiosity: Ask "why" to a love confession

• When he confesses his love in the cafeteria, choose "Why?"

Rain Soaked Lips: Kiss a boy

• When he throws the bracelet, choose "Kiss him to make it up to him."

Refractions: Jump, sink, and drown

• When he throws the bracelet, choose "Jump in after the bracelet", and then choose "struggle".

And Then There Were None: Realize you could have won... too late.

• When he throws the bracelet, choose "Jump in after the bracelet";
  
• And then, in the Observatory, choose "dodge", and then "help him"; or choose "step back", and then "Hint for him to attack the Bear instead" to get into a fight with the Bear.
  
• And then, choose "step to the side".

Total Defeat: Lose the fight

• When he throws the bracelet, *do not* choose "Jump in after the bracelet";
  
• And then, in the Observatory, choose "dodge", and then "help him"; or choose "step back", and then "Hint for him to attack the Bear instead" to get into a fight with the Bear.
  
• And then, choose "step to the side".

Mutually Assured Destruction: Bring your enemy down with you

• When he throws the bracelet, *do not* choose "Jump in after the bracelet";
  
• And then, in the Observatory, choose "step back", and then "Bring the Bear down with me."

Past, Current, and Future: Build a future together

• In his room, choose "Tell him about the ritual."
  
• And then, choose "Go to The Witch to reverse the ritual."
  
• The day after reversing the ritual, choose "I think I love him."

Water Under the Bridge: Decide you are better off as friends

• In his room, choose "Tell him about the ritual."
  
• And then, choose "Go to The Witch to reverse the ritual."
  
• The day after reversing the ritual, choose "I'm not in love with him."

Bubble Burst: Wait for someone who never showed

• When he confesses his love in the cafeteria, choose "(Lie) I love you too."
  
• When he throws the bracelet, choose "Kiss him to make it up to him."
  
• In his room, choose "Tell him about the ritual."
  
• And then, choose "Wait a few days."
  
• When he comes to your room, choose "Then beg", and then choose "I will go to The Witch right now."

Dissolution: Lose him the same way you found him

• In his room, choose "DO NOT tell him about the ritual."
  
• OR, tell him about the ritual, and then choose to stick with the ritual at various later points in the story.

Bleeding Heart: Take possession of his heart

• In his room, choose "Tell him about the ritual."
  
• And then, choose "Wait a few days."
  
• When he comes to your room, choose "I still have one more day. I'll decide tomorrow."
  
• And then, when The Witch presents you with a choice, choose "I'll do it."

Master of Fate: Unlock all possible endings

10 endings are required for this achievement:

• 5 mid-game Bad Ends (Impulses, Refractions, And Then There Were None, Total Defeat, and Mutually Assured Destruction)
  
• And 5 end-game endings (Past Current Future, Water Under the Bridge, Bubble Burst, Dissolution, Bleeding Heart).