I will go out on a limb and say that F.A.T.A.L. is truly dead. Although I'm not sure anyone ever played it in the first place, so... can something die which was never alive? (House Greyjoy would say no).
Is the Primeval Thule setting dead? The company that published it appears to be defunct, and it seems to be a given that nothing more will be released, even material previously announced. And I'm reasonably sure no one is playing it anywhere. On the other hand, it's still for sale on DriveThruRPG. Does that make it "alive"? Even if no one is buying it, which seems likely? I don't know. But I liked that setting a lot and I'm sad it flopped.