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.
Listen to all the cassettes.
Get to the end of 1000 Knights.
Complete the Thunder Rangers poster in the High School.
Let the Keykeeper catch you while holding the hall pass.
Clean up the broken objects in the apartment.
Put all the soldier and knight toys in their respective bases, in the House.
Find the 3 strange medicine bottles.
Finish the game.
Finish the apartment level.
Finish the high school level.
Don’t get hit by enemies while in the Otherworld.
Complete the house without being caught by any ghost.
Finish the house level.
Complete level 3 of Generic Knight.
Enter the Otherworld for the first time.
Finish the tutorial.