Screamers

Screamers is a sci-fi horror flick released in 1995. Like a lot of science fiction flicks, it's based on a story by Philip K. Dick.  The movie stars Peter Weller and focuses on killer machines on a ruined world. Paranoia is a big component of the story and their are a variety of Screamers. There was a straight to DVD sequel released in 2009 called Screamers: The Hunting. I've watched it and definitely don't recommend it, unless you just have to consume all media. The only notable thing is it features a pre-Arrow Stephen Amell.

While look for fan material for the Alien RPG I found a cool pdf that discussed incorporating Screamers into the game. You can find the original post here on the RPGMarshal blog. The pdf discusses two different ways to add Screamers to your Alien game. Additionally the story's factions, the NEB and UPP are presented. The pdf then presents a page of general rules for Screamers and then a one page write up for Type 1, Type 2, Type 3 (with mention of Type 3-b), and finally Type 4. If you play the Alien RPG or any other Year Zero Engine game you should check out the pdf.