From personal experience (wired Xbox 360 controller, wireless Xbox One controller) and from the reports on the Steam discussion forums, it appears that controller input is buggy and to list that it has "full controller support" is not entirely accurate. Also reported that the Steam controller has issues.
Talk:Firewatch
Why is everyone adjusting the FOV instructions?
I wrote ones which actually work and yes, they do go against what the developer said but the developer is confusing the horizontal and vertical fov.
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