The HCZ and barnacle one is probably true, in c1a2a theres sealed off rooms in the walls that zombies were gonna crawl out of h_player.mdl is a model that wasent included in the files but was in the non functional demos tentacle beak was some werid object that was probably in a more recent version we dont have but it has the object for it in this alpha at some point the first person weapon models had a completly diffrent hev suit model, instead the arm parts ended under the hands
i wonder what this early barnacle and zombie version would look like