In the "Natural Disasters" DLC for Cities Skylines are some new Steam achievements. One of them is What the...? - Experience a special disaster. I tried several things and messed around with disasters but wasn't able to figure it out. My research was unsuccessful.

Can somebody tell me how to achieve this? Any answers welcome.


1 Answer 1


This was interestingly hard to find since usually achievement guides are all over the place. However, according to this Reddit post you have to experience a "Chirpnado".

According to Reddit user wasmic:

It's the chirpnado. It has a very, very low chance of occuring. 3/703 - or 0.42 % - of all disaster will be chirpnados.

I wasn't able to find exactly what this disaster will do but, keep a look out for tornadoes sporting little blue birds.

  • I guess that's why it's called a special disaster and not a natural disaster.
    – Timmy Jim
    Commented Dec 6, 2016 at 18:09

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