Tell Me Why

Story-forced right at the start - unlocks as Tyler leaves the Fireweed Residential Center.

Story-forced in Chapter One - unlocks the first time you enter the old Ronan family house.

Pick up your first of the 13 hidden Book of Goblins wooden figures - the earliest is in the opening chapter. See And Everything In Its Place for collecting all thirteen.

In Chapter One, solve the animal-symbol lock on Mary-Ann's bedroom door: Moose - Bear - Pelican (the order comes from clues around the house).

Story-forced in Chapter One - unlocks during the flashback where the twins agree to lie about the night of their mother's death.

Complete Chapter One (Homecoming). Unlocks automatically on finishing the chapter.

In Chapter Two, interact with the old carved graffiti (the arborglyph) on the tree to correct it.

Story-forced in Chapter Two - unlocks when you uncover the intel about Mary-Ann's past and her death.

In Chapter Two ("Ahoy Goblins!"), match the Book of Goblins character drawings to their real-life inspirations: Pelican - Moose - Bear.

Story-forced in Chapter Two - unlocks during the cemetery scene where the twins make peace with their mother.

Complete Chapter Two (Family Secrets). Unlocks automatically on finishing the chapter.

In Chapter Two ("Plushy Fight!"), win the plush-toy battle mini-game against Michael in the store (best of three).

Story-forced in Chapter Three - unlocks when the story reveals the truth about Sam's relationship to the twins.

In Chapter One's "Rashomon" episode, gather the evidence first (read the emails to find the "Alliance for Traditional Families", and check the ledger in locker 2004), then answer: October 2004, "You told her about the camp", and The Virtue Seekers Youth Camp. Presenting all the evidence makes Tessa tell you everything.

In Chapter Three ("Chosen Family"), play the fishing mini-game as Tyler and catch the full set of fish.

In Chapter Two ("Cold Case"), in the police archive filter the records by the "Ronan Children" and "Recording" tags, then play the twins' 911 call.

In Chapter Three ("Princess and Tiara"), solve the three attic puzzle boxes (or smash a box to skip). Solutions: (1) Hands - Tree - Princess - Castle - Title; (2) Bird - Ballet - Engineering - Painter; (3) Castle - Flower - Clock - House - Dinner Party.

Finish the game with a strong twin bond, by consistently making relationship-strengthening choices across all three chapters. The bond is cumulative and mutually exclusive with Life Tears Us Apart per run, so flipping it generally means a second playthrough.

One of the two mutually-exclusive endings - lock up and leave the Ronan house with Tyler. Replay the final episodes via scene select to also get A New Chapter.

Take the optional "sit and talk with your twin" prompts in Chapter One (the bench by the house, and at the police station) rather than skipping them. Replay the scene via scene select if you miss it.

In Chapter One ("To Serve And Protect"), find the login note in a locker, then log into the police-station computer - User: D. Wilson, Password: Salem.

In Chapter Two's "Ahoy Goblins!" cleaning scene, stick the sticky note on Tyler's back.

In Chapter Three ("Paternity Test"), eavesdrop on the conversation, then answer Officer Wilson that the culprit is "an animal" to reveal the Mailbox Bandit.

In Chapter Three ("Adrift"), help Sam fix the boat engine - fetch the oil from the cupboard and finish the repair.

In Chapter Two ("Plushy Fight!"), find the three classic movie-style posters in the grocery store that nod to Dontnod's other games (Life is Strange, Vampyr).

In Chapter One, try to open a locked door (the barn works) a few times until the game throws up the "when we say locked, it's locked" line.

In Chapter Two ("Ahoy Goblins!"), after clearing the coffee table, keep setting off the moo box until Tyler admits it's actually funny.

Once you've collected all 13 hidden Book of Goblins figures across the three chapters, place all 13 on the attic display shelf in Chapter Three. Use scene select to grab any you missed first.

In Chapter Two ("Plushy Fight!"), find the three classic movie-style posters in the grocery store that nod to Dontnod's other games (Life is Strange, Vampyr).

The opposite ending to Lock-Up And Go - start anew with Alyson. Get it via a scene-select replay of the finale if you took the other branch first.

Finish with a weakened twin bond, by consistently making relationship-weakening choices throughout. Cumulative and mutually exclusive with Twins4life - needs a second run or heavy scene-select to flip.