Wow. You have absolutely no idea what are you writing about don't you? A hammer. Wow.

Then combine that with the essentially ludicrously technically flawed macguffin of the film — "trapped with no weapons" — which is utterly required by every aspect of the plot.

I say ludicrous because it fails to grasp "Tool==weapon". A hammer is a GREAT club. A screwdriver does a GREAT job at stabbing things. Any spacecraft is going to have on it a massive array of TOOLS which can be converted to a weapon against the monster in no time whatsoever. Laser welders, molecular monofilament, simply all manner of advanced TOOLS which would inarguably be easily found on an interstellar ship and readily turned into a weapon.

"It's got acid for blood" Fine, put it in an outer bulkhead that you can seal it off, make sure the gravity is directed so that the acid eats through to the exterior and then evaporates into space. Problem solved.

It's an "Idiot" plot — the only reason the story continues to advance is because EVERYONE INVOLVED is a complete and total IDIOT. One character exhibits the slightest brains or resourcefulness and that thing is sliced alien parts being exhausted out into space.

Other than the chestbursting scene and the impressive design work from Moebius and Giger, the movie is a vastly overrated waste of time and money.