One Of Us

From publisher blurb:

A one-off scenario for a referee and three players. Three passengers come out of hypersleep, blurry, dazed and without their memory. They are in a lifeboat about to descend to a planet's surface. Why? Who are they? What's the emergency?

And then they simultaneously spot the dried husk of an upturned xenomorph impregnator, a fiendish-looking pale spider. They all know what this means ... one of the three has been impregnated with an alien egg. But which one? And do they have time to do anything about it as the lifeboat hurtles toward the forbidding looking desert below them ...