Every time you have a choice between 2 or 3 options, there is an achievement tied to the one you select first. Just pick any option, then when you get the choice for the other... exit to main menu, Load that scene again, and pick the other option and continue onward.

When there is a bad end option, pick that one first.

Night One: Living Room
When you Care about Song Yue or Go and help Gao Yan - pick CARE first for Heartbreaking Scene or HELP first for Volunteer Spirit

Night One: Side Hall
When you Search for Sofa or Search the TV Cabinet - pick SOFA first for Third Eye Opened or TV CABINET first for Third Eye Closed

Night One: Offering Room
When you Search the Table or Search for Coffee Table - pick TABLE first for Lele's Birthmark or COFFEE first for Whose Shoes?

Night One: Guest Room
When you Go and Look or Keep Sleeping - pick LOOK for Don't Trust Hallucinations [Bad End] or pick SLEEP for Gao Yan's Not Right

Night Two: Warehouse
When you Search the Shelves or Search for Crib - pick SHELVES first for Bloody Box or pick CRIB first for Age Doesn't Add Up

Night Two: Toy Room
When you Check the Train or Check the Sofa - pick TRAIN first for Toy Train Mystery or SOFA first for Touched Something?

Night Two: Living Room
When you Leave to Song Yue or Take the Cake - pick TAKE for Ring Discovery or LEAVE for Too Polite to Like?

Night Three: Guest Room
When you choose Doesn't Open Door or Open Door for Lin - pick DOESN'T for Warm Human Touch or pick OPEN for Unreadable Hearts [Bad End]

Night Four: Living Room
When you choose Family Photo or Family Portrait - pick PHOTO for Unexpected Path or PORTRAIT for Painted by Non-Humans [Bad End]

Night Four: The Ending
Ending choices: DEAD for Dead End? Did Gao Yan Die?, TRAPPED for Trapped End? What Do I Do?, and MYSTERY for Mystery End? Gao Yan? Or...?