I don't know if this is intentional or not, but the mapgen is capable of generating native settlements on the arctic terrain tiles. This is easiest to reproduce in the map editor when you generate terrain and set the temperature to Cold.
Given that the players are not allowed to put colonies there (under the default rules/difficult) there, this seems like a bug.
Or are the natives intentionally allowed to settle on arctic tiles?
Version: 0.13.0+dev, commit 6f399d438f4ae9aaa515aaadc8437afcab9868d2
I do not think this is a bug.
Yeah this was more like a question than a bug report. But I still wanted to report it to make sure if this really was intended or if this was something that was overlooked.
Gameplay-wise, I have no strong opinion on either side.
I doubt it was intended. However when the various climate settings were added to the map generator it was understood that you could abuse them to get odd results, and that there was no interest in preventing users from generating weird maps.