Introduce the ability to build Robots as you wish. You could introduce a separate crafting hanger or something. With the ability to design how it moves (bipedal, on all fours, insect, arachnid, etc.), how it looks, how big it is (depending on how much resources you wish to use such as 10 steel bars for a small basic Robot, or like 100 impervium mixed with 40 titanium for a very large powerful creation), what weaponry it utilizes, how fast it moves, what power source and fuel (nuclear reactor requiring you to craft uranium bars or multiple diesel engines requiring oil for example). There could be so many opportunities and it could allow for random events such as giant monsters invading your home planet and you have to defend it or the creature will carry on its rampage until everything is wiped out. This could also lead to you receiving requests from other planets for your robots assistance against a creature, or even a powerful army or foe of any kind.
i like your idea but i don't think fighting an army would be possible in starbound.Not that its not possible(i'm not sure if it is) but it would look really weird if you say 100 guys just start to attack you.
