Will Frictional Games make more Sea/Air monsters?

[The Rock Worm]

After the Penumbra series, and Amnesia 1, I've began to wonder when will they make more sea creatures and aerial creatures? All they've done, mostly, are ground monsters.

I and others here in the forum are trying to have a story with a lot of sea monsters and sea stuff, but with only one invisible monster to work with it's not going well. The sea is largely unexplored and plenty of real life critters down there are scary looking, and they are the known monsters. Plenty of good and terrifying stories can be made from this realm.

Flying monsters are another set of good monsters that Frictional Games hasn't made much use of. Imagine in a dark forest, where horrific bat-like (at least echo locating) swoop down to kill you and you can't hide from them nor see them well!