Such a terrible idea. You kids with your half life two creatures and your mythological requests. This is a human on human survival in the wilderness game. Go play natural selection 2 if you want aliens. Please quit with the unrealistic monsters ideas. It won't happen. Grow up, there is only room for additional wildlife, not dinosaurs, not minotaurs, not predators with shoulder mounted plasma cannons. Seriously, go play the hundreds of other games that are designed around those concepts. This game is not one of them.
Did Garry told you all of this? This game had zombies which are now replaced with red wolves and bears which drop backpacks you think that's real? I seriously doubt that Garry ever said he wanted rust to have only real animals as npcs and nothing else. Correct me if I'm mistaken please.