The game really does need new achievements. In this case I have some ideas for some.
Pro Journalist - Beat the game without getting caught.
Helpful Tools! - Get every tool in the game for your tool rack!
Paint Catastrophe - Prop up 10 paint cans on doors.
What the Hay? - Land on a pile of hay from a high place.
Let's Bounce! - Bounce on a trampoline 15 times or on Gerda's seating area.
Skipping Stones - Throw 6 rocks in the lake.
I Am Not Trash! - Throw 8 trash bags at any character.
Don't Fall! - Fly with a fire extinguisher as high as you can.
Window Smashing Simulator: Break 10 Windows from any house.
Unlucky Journalist - Get caught more than 15 times in Hello Neighbor 2.
A Walk to the Park!: Beat the game without running or crouching.
Secret Achievements:
Mysterious Tapes of Raven Brooks - Play and collect all tapes.
The Mystery of the Fountain - Open the Golden Apple fountain at the park and reveal the truth.