Just to weight in on 'Stompy' - I think it pretty much emulates what we see in the movies to be fair. In 'Alien 3' after Clemens is killed and Ripley recoils to the wall, the runner stomps over to her. When it runs across the ceiling in the tunnels surrounding the blast furnace it rapid-stomps (and later seems almost silent and light-footed when having doors sealed behind it).
In 'Alien', we don't get an opportunity to hear it stomp - it attacks Brett from the ceiling, Dallas in the ducts. When it attacks Lambert and Parker it slowly stands raising itself to full height, but we don't know if it stomps, as all we hear is the overbearing soundtrack and see it slow-mo back to Lambert after killing Parker. In the shuttle it falls to the floor and then simply stands again before being blasted out of the airlock.
In 'Aliens', the only time we see the xenos standing/moving on the metal grates, there is always either Smart Gun or Pulse Rifle fire (or we anre viewing them through a monitor whilst sentry guns are firing) and heavy soundtrack. The times we see them moving silently they are coming out of the hive walls or ceilings. (And whilst the queen is larger, we hear it stomp over to the loader bay door in pursuit of Ripley on the Sulaco)
And hate to reference 'Alien Resurrection' for anything (as it gets everything about the creature from its sound to behaviour etc wrong) but pretty sure when we get that camera shot from beneath the xeno as the crew are trying to get through the door before Ripley shows up and shoots it the mouth, we hear a stomp as it's foot comes down.
I'd need to rewatch Covenant for the airlock scene as whilst I can picture it I can't hear it in my head 🤣
But I don't think 'Alien Isolation' was OTT - if it was attacking from lurking on the walls or ceilings I'd expect it to be silent, but walking around the station without an overbearing movie soundtrack? Corresponds to 'Alien 3'. 😃
