I,d like the gigerbug to be an alien that appears from time to time only, tries to capture/kill you, and if you are succeded then he dissapears, and will try again later in the game.
I,d like to be constantly facing warriors and runners, but for the gigerbug I,d like It to be the unkill-able monstrosity that is stalking you during the whole game. Just one giger alien in the game..., he is that special alien.
Of course It would have a crucial role at the end of the game, just when you are trying to scape from the planet after defeating the queen or something like that, then you would have your "last" encounter with the creature..., that would be gloriously cool imo
While this game is based on A L I E N S, meaning this that the warrior is the main enemy, the giger alien could perfectly being "that" other alien as well, and that would not fuck the game by any means, just the opposite, and we would finally mix two different canonical concepts of the alien (Scott-Cameron)..., why can we kill those blue monstrosities, but we can,t kill the other one?. It would be very cool from a storyline point of view, you know, when we find those records on the floor (ala doom3) and we hear the scientifics who were working there before "the incident" talking about the experiments on the gigerbug and trying to explain why It,s so different to the others..., of course, the giger alien scaped, and is now awaiting you and your squad, and this is not good news.