Finding the missing statues' heads is a must to unlock the Museum's Attic and free Aaron in Hello Neighbor 2.

The code to unlock the safe is 1984. However, in order to crack the Safe in Hello Neighbor 2, you’ll need four colorful cubes that are scattered across different locations in the house.

To unlock the Principal Door in Hello Neighbor 2 Back To School DLC, Quentin must activate the generator which forces the Janitor to head inside the shed, leaving the key hanging outside.