This trope is about any Robot that is built for the intent purpose of participating in a war as a combatant. These machines either supplement soldiers as a part of a battle force, or replace them entirely. They can be anywhere on the Sliding Scale of Robot Intelligence, but generally stand between 1 and 3 on the scale. Obviously, these robots are not Three-Laws Compliant, since they must be able to violate the First Law on a regular basis. This does not necessarily mean they are psychotic mass murder machines, though depending on who built them and why, they easily could be. The distinction between this trope and Mecha-Mooks is that Mecha-Mooks are, well, Mooks. By definition, Mooks are disposable, mass produced bad guys with few or no special attributes that only exist to be easily destroyed by The Hero. So while robot soldiers can be mooks, there's no law that says "all fighting robots are mooks". A robot soldier can easily be anything from a mook, to an implacable killing machine, to the hero of a story. A REMINDER: This trope is for soldiers that are also robots, not simply any machine that is able to fight. The robot must either be a part of a military unit, or be specifically made to serve as part of a military unit, or they are not this trope.
- Attack Drone
- Grey Goo (when nanotechnology is used as a weapon)
- Mechanical Abomination (if it happens to be a soldier)
- Mechanical Monster
- Robot War
- Sapient Tank
- Sentry Gun
- Spy Bot
- Starfish Robots (if the work is going for realism, they will be this)
- Surveillance Drone
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Films — Animated
Films — Live-Action
- An important part of the backstory of Cave Story involves a war, in which an army that was sent to exterminate the Mimiga creatures living on a remote island. Though it's not immediately obvious, the player character is one such robot. Initially, he meets several NPC's who wonder if he's "a soldier from the surface". Then Professor Booster clarifies that he is a robot soldier. Shortly after, you meet Curly Brace, another robot and a veteran of the same war as him.
- Fallout has had two robot armies so far. The robot armies controlled by the Calculator in Fallout Tactics: Brotherhood of Steel, and the Synths controlled by the Institute in Fallout 4.
- Overwatch takes place after a massive war between Humanity and their Omnic creations.
- Ratchet & Clank always features hordes of robot soldiers. While there are usually organic fighters in there as well, they will be vastly outnumbered by robots on both sides of the conflict. A notable case of this is the Galactic Rangers in the third game.
- In Stellaris, with enough research, robotic armies and android armies can be built for either planetary defense or invasion.
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