Here is the full list of all 21 In His Time achievements.
Break free from a nightmare.
Escape from school.
Sneak into the creepy old mansion.
Recover the lost notebook.
Get Mila to return what she stole.
Wake Joseph up.
Find something special in the cemetery.
Achieve perfect victory in Concentration.
Play with Hugo.
Listen to Joseph's past.
See Olly through to the end.
Break a plate.
Get a perfect score in class.
Get a perfect score on the third problem.
Rouse Thomas from his sleep.
Talk to Charlie in the cemetery.
Hear William talking to himself.
Find Bobby in the cemetery.
Complete the sliding puzzle.
Find Elliot collapsed outside.
Witness David’s visit to Malin's house.