Here is the full list of all 18 Between Me and The Night achievements. It takes around 6-8 hours to unlock all of the achievements on Windows.
Finish the tutorial.
Finish the house level.
Enter the Otherworld for the first time.
Finish the high school level.
Finish the apartment level.
Finish the game.
Put all the soldier and knight toys in their respective bases, in the House.
Clean up the broken objects in the apartment.
Complete the Thunder Rangers poster in the High School.
Find the 3 strange medicine bottles.
Don’t get hit by enemies while in the Otherworld.
Let the Keykeeper catch you while holding the hall pass.
Complete the house without being caught by any ghost.
Get to the end of 1000 Knights.
Complete level 3 of Generic Knight.
Listen to all the cassettes.