What is the secret

When activate the game gets a little harder for a while (Exact length unknown) as enemies spawn as minatures

How to activate the secret

You can find miniature enemy statues that you shoot and when you shoot all 6 of them you activate the secret

Locations

There are 6 objects one in each area that you unlock via Skull Tokens

The first one is located in the Parking Garage on the right side near the orange van

The second one can be found in the arcade on the back wall with the racing machines

The third can be found in the movie theater attached to the arcade in the right set of seats third row from the back

The fourth is in the garden in the corner to the right as you leave the theater

the fifth one is in the VIP Clubs Down stairs near the “private booths” far back on the right if you enter from the garden

The sixth and final one is upstairs behind the bar on the shelf