Super immersive. The ambience is really nice and the locating the ducks by sound is a cool feature. Old school FPS depth fog added to the game a lot too.
Sadly I think my first run bugged out and a duck ended up outside the map because it was somewhere with very rough terrain and I got too close to it without being able to see it. Had loads of ammo just could never find it to catch it.Never found it again (the last one).
While a map would have been maybe too much because of inputs: either a compass (realistic for someone out in the wilds to have one.) or some kind of rotating minimap would have been cool, both just as a UI on the screen. Even just for orientation. I know there was a map in controls, but all I was looking for was a way to orient myself in the world and remember, hey X is at the north edge of the map, X is to the south.