There is a black guy on top of the rooftop, portal radio and a baby doll. There might be more. There is also airboat in a garage but idk if the bridge and door can be lifted so it might be just decoration

In the same room where the portal radio is in(the radio itself is behind a bunch of boxes) if you break the vent that protrudes from the ceiling "something" pops out.

I'm trynna figure it out, in the reception room there is a yellow key that opens a box with a lock in the warhouse, as well as two buttons. On top of the reception window there is a black panel with two lights, the left button controls the left light and switches its color from green to red, while the other controls the right light (which is red by default) and causes sparks appearing to be broken. I don't know what pressing any of the buttons do to the map, what happens when the right button is fixed, what happens when they are both green, or what the box in the warehouse has anything to do with it but I think its connected to the radio and the speakers that are found on the walls all throughout the map. Theres also a control panel you can press in the airboat hanger.

引用自 Ozarka：

I'm trynna figure it out, in the reception room there is a yellow key that opens a box with a lock in the warhouse, as well as two buttons. On top of the reception window there is a black panel with two lights, the left button controls the left light and switches its color from green to red, while the other controls the right light (which is red by default) and causes sparks appearing to be broken. I don't know what pressing any of the buttons do to the map, what happens when the right button is fixed, what happens when they are both green, or what the box in the warehouse has anything to do with it but I think its connected to the radio and the speakers that are found on the walls all throughout the map. Theres also a control panel you can press in the airboat hanger.

The left one locks/unlocks the revolving door the right one is most likely meant for the door past the prop stack but the button is broken so you can't open it (Most likely its because that door leads to outside the map :P ) But i didnt know about the key so thanks for that!

i found a screaming baby

also found a portal radio behind some boxes

shooting the baby makes a low grumble and the baby dissapiers

im found some animal into vent (if break he) in room with portal radio

If you throw baby doll in drain something will happen

If you go past the vent above the CSS crates and take a left up the stairs ahead click the vent. If you do this you will open a secret door that leads to a satanic ritual/ragdoll killing room. (you can alternatively just noclip here) if you need better help finding the L bend of draining water and the server(?) pit void thing are close to the staircase. Hope this helps

also if you destroy the baby doll then go to gate 5 and look at the shadow guy on the overhead bridge you will hear a noise and he will disappear. The couch the doll is on will also be gone and replaced with blood.

The Radio (not to be confused with the Portal Radio) has a hidden image, i dont know what exactly but it needs to be played through something specific, similar to how that one seed in the April Fools Snapshot for Minecraft was discovered.

There's some sort of key in the Garage. Might be from the realistic crate breaking mod, But it might be from the map itself. I honestly do not know where it leads to. I also Just now discovered it.

No that key is there, i have no idea why it's there as i have been on this map tons of times and not once did i ever see a locked door that actually leads somewhere, The locked prop doors do not count and you can just easily break the lock for those, But this key is mysterious, I'm planning on decompiling this map to see if this key even has a real connection to anything.