So my question is what would make an army of droids unstoppable when facing against humanoid species? (specifically how would droids be designed)
For context one person sets foot on a planet with very advanced technology, but its inhabitants lack imagination to use it to Its full extent. The outsider starts modernizing but this upsets the natives. And so a war begins. Other planets come into play in the conflict (due to them being political allies) and so one person with factories at his disposal has to create an army capable of defeating the threat. By defeating I mean either negotiate, incapacitate or destroy the attackers. Having to conquer planets for resources is a likely turn of events.
The army needs to be entirely mechanical (no biological components, unless we are talking about a biological weapon like diseases). The machines or droids need to be capable of defeating armies ranging from battleships to foot soldiers. There is no concern about cost, as there are fully autonomous factories at their disposal. The technology is advanced enough to have quantum computing, space travel (distortion), artificial gravity, plasma weapons and forcefields. Materials that can be used are everything found on the periodic table, no fictional elements!
This mechanical army is facing fleets of battleships and armies on the surface of the planets. For reference look at everything from Star Trek, Star Wars, Starship Troopers ect… The battle is mostly defensive in nature as the purpose is self defense, to protect one individual. However you may want to take into consideration the fact that some races don’t surrender or negotiate and need to be eradicated for the threat to disappear. So yes, conquering planets and killing off the population is allowed.
So far these are the things I’ve got figured out:
The battleships would obviously not be designed for organics. The ship is basically a giant droid with an autopilot. They are no corridors, instead droids are stored in the ship, ready for deployment. Instead of hallways a series of tubes transport things across the ship. Each ship is equipped with a factory and refineries in order to construct additional troops, bases and more ships.
Infantry droids are mass produced and are lacking in power. They make up with their numbers and compactness making them easy to store and produce. They have a basic AI that allows them to function independently, however they require a central command to direct their movements. Droid generals need to present to coordinate the movements of the troops especially since they will often be outside the transmission range of a battleship. So far my best artillery droid is like a mobile turret that can roll itself to a new location, lock into place and fire at will. They can also fire while rolling.