We have a fairly huge map that has to be filled with a lot of different ambient sounds for a lot of different like varied ecological areas.

We've had help from a sound designer called Dennis Vilatov who's been doing great work and we couldn't really implement sounds the way that we've done in the past.

I looked at a talk from developers of Witcher 3 and they had some smart solutions to doing big world ambient design.

We had some requirements early on for the ambient sound that it should sound alien, that it was important that you feel that you weren't on earth.

It's harder than you think to make stuff sound alien.

Like you want to give someone the feeling of being in the forest.

but you don't want them to hear the birds that they wake up to every day.