Given that it is practically impossible to get ahold of the Aliens board game anymore, and given that said board game kicked arse as only a faithful interpretation of Cameron's best movie could, I really can't recommend highly enough this Flash version.
h/t to MGK.
Update: My current best result is to have escaped the planet with Ripley, Hicks and Newt, as one would expect, and also Dietrich, Drake and Crowe. Also Burke, so we have someone to slap around on the way home. Anyone done better?