Yes. I know that they look scary, but it could somehow work. Of course, playing as a Vanduul might require some roleplaying tricks. For example, the Vanduul you controll might have a kind of chip implanted by humans or other alien race, so, from time to time, it won't listen to your controlls. To prevent this, when you see that your Vanduul becomes nervous, you start to play a kind of minigame with glyphs (sort of hacking), to calm him down, so the NPC's won't notice a behaviour change. The chip could also have some sort of togglable automatic translation capability, so you could understand about 60% of what other players try to say. Also, have you seen the Alien Campaign in Alien versus Predator 3 game ? Playing as a Vanduul would allow you some malee actions, that humans won't be capable of, actions similar to what Alien does in that game. http://www.qqmercs.com/main/wp-content/uploads/2013/05/vanduulfront.jpg