Areal is a post-apocalyptic, open-world shooter that claims to be the "definitive spiritual successor to the cult hit S.T.A.L.K.E.R. series". Another claim: that its creators, West Games, are a team mostly "composed of former senior GSC Game World staff members". It's currently on Kickstarter, and it's looking for $50,000.
That's the basic starting point, but things get a lot more complicated.