No missable achievements (plus 18 unknown)
Sign in with Steam or Xbox to track your progress, and:
Finish the tutorial.
Enter the Otherworld for the first time.
Finish the house level.
Don’t get hit by enemies while in the Otherworld.
Put all the soldier and knight toys in their respective bases, in the House.
Finish the high school level.
Finish the apartment level.
Finish the game.
Let the Keykeeper catch you while holding the hall pass.
Find the 3 strange medicine bottles.
Complete the Thunder Rangers poster in the High School.
Complete level 3 of Generic Knight.
Complete the house without being caught by any ghost.
Clean up the broken objects in the apartment.
Listen to all the cassettes.
Get to the end of 1000 Knights.