Second Variety, https://en.wikipedia.org/wiki/Second_Variety I've commented this before but it is closer to Terminator than the Harlan Ellison story IMO.

Yeah, that was the one. Really burned itself into my mind.

The movie was OK, but you can only get shocked once.

Similar but reverse, I felt unfortunate to have read the novelette after watching Terminator because part way in the story I thought - this is almost all of the AI/self replicating autonomous robot points of the Terminator movie just without the time travel. The movie addition of time travel adds a bit of hope to an otherwise totally bleak story resolution.

Haven't read the book, but I did see "Screamers". Wikipedia says: "Future Imperfect: Philip K. Dick at the Movies, writes that the film is more faithful than most other adaptations".

I can't comment on whether that's true, but the movie still haunts me. Odd, since as Wikipedia says "it received a mixed critical reception and failed at the box office". There was nothing mixed about my reception of it.

It's pretty wild that PKD imagined AI controlled combat drones in 1953, and 70 years we'll soon have them.

I haven't read that one, but it reminds me of Black Mirror's "Metalhead", which absolutely terrified me.

The movie Screamers (https://www.imdb.com/title/tt0114367/) is based off it, decent sci-fi.

draws from the same well, intellectually. terrifying stuff, that BM episode is, too.