Mechanical Abomination

A robot, cyborg, computer, software entity or other manufactured being which has surpassed simple Artificial Intelligence and become an Eldritch Abomination in its own right. At the lower end of the scale the Mechanical Abomination is little more than a powerful monster, superhuman -- often dramatically so -- but still ultimately vulnerable to the "insignificant" humans who might oppose it. However, most such creatures are usually beyond simply being "better" or "smarter" than humans -- they are for all practical purposes gods in power and purpose, and that purpose is thoroughly and unambiguously malign -- at least as far as humanity is concerned. (This may be a case of turning on its creators, or the inevitable result of an alien being's Blue and Orange Morality -- but either way, Mankind is going to get the short end of the stick.)

A Mechanical Abomination may not have explicitly supernatural powers, but when they do, they frequently start at Reality Warper and move on up the scale. However, even without mystic might, a Mechanical Abomination can still have fearsome power and reach -- consider what Colossus and Skynet were capable of.

Can be a sub-Trope of Our Demons Are Different. Contrast Robotic Angel.

Film

 * Colossus from Colossus: The Forbin Project "merely" controlled the world's nuclear arsenal. Once it started giving orders to the humans that built it, though...
 * Even more foreboding than Colossus is Skynet from the Terminator franchise. With both legions of skeletal Killer Robots and Time Travel at its metaphorical fingertips, it was as close to being a god as is possible without actual supernatural power.

Literature

 * AM from Harlan Ellison's classic story I Have No Mouth, and I Must Scream.
 * Obie from the later Well World books by Jack Chalker was forced to be this for a short time by a Restraining Bolt and a malign master.

Live-Action TV

 * Adam from Buffy the Vampire Slayer is this as a result of the experimentation to combine cybernetics and the supernatural.

Video Games

 * Among the bosses in Ōkami, Yami is a known demonic cyborg.
 * Doom has several types of these, including one named simply Cyberdemon.

Western Animation

 * The Robot Devil aka Beelzebot in Futurama is a prime example, although he does has his limits, such as finding sacrificing robot child as cruel, which Bender begs to differ.

Real Life

 * God, we hope not.