Wait a sec, the King Kong remake came out in 2005, but this place was locked down in 1994. And I doubt anyone would have left these disturbing drawings hanging when they moved out, so that means...

Oh shit...

Reminds me of the alternative Hotel in Silent Hill 2.

You seem to travel around in the eastern part of Germany a lot, so here's a little advise: you can buy old NVA NBC suites for less than 15€ at every street corner, gas masks with air filter cost less than 5 bucks.

Despite them being over 20 years old, they're still working fine. Many people use them for this exact purpose (including me) and nobody has ever complained.

http://www.wolfhazmat.de/military_nvaabc.htm

The sniper variant of the gas mask costs a little more, but I guess it's more convinient when you operate the camera.

Reminds me of the Warroom from Dr. Strangelove