[vacri]

Wikipedia says it's Paradox Development Studio, which is the design studio, where Paradox Interactive is the publisher, and both are under the same parent company. As far as I am aware, the 'clausewitz engine' used by these games isn't available to other developers.

Who are you seeing as the 'not-Paradox' developer for CK2?

[oblio]

Cities: Skylines. Wikipedia says it's made by Colossal Order, a Finnish company: http://en.wikipedia.org/wiki/Cities:_Skylines

EU4 and CK2 are made by PDS, part of Paradox Interactive, a Swedish company.

The confusion was because the thread is actually about Cities: Skylines. That's the game that's only distributed by Paradox, not also made by them, and the one I was confused about.

[vacri]

Sorry, I misread what the thread was about. Thanks for the clarification.