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