A new, “revolutionary” form of government is invented, and turns out so bad that the government itself decides to shut down within the month and give itself to the rebels that don’t even exist yet.
A physics system wherein objects that hit each other don’t just bounce, but instead spaz out and fly into the air, or glitch awkwardly through each other.
Write a healing story. Not a story about a healer (though you certainly can if you want), but a story that is the very essence of positive emotions. No deaths of parents or siblings, no traumatizing accidents — basically nothing you’d ever see on the news.
A pretty good sword that won’t actually work unless it’s used by someone wearing a specific terrible set of armor. The sword was designed purely to sell the armorer’s armor.
Write a small group of evil characters who are all defined by the nice things they do.
Your character goes through the whole story surrounded by various people, none of whom speak the same language as him. All communication is non-verbal.
A bunch of teenagers get fed up with the system, man, and make their own society on an island where money isn’t even a thing and only exists as a concept, so they can pay their taxes by saying, “I pay my taxes” when the tax collector comes around. They also do everything else in concept, too, so instead of dying in civil war, they just act out shooting and dying and get back up afterward, possibly roleplaying as ghosts next.
Write the most compelling character you can think of, then make her the hero’s sidekick. Now write the hero, as compelling as the sidekick. Make her the love interest. Finally, write the villain, just as compelling as the first two. Make her the hero.
A magic system wherein magic of all sorts is powered by fossil fuels, and green technology doesn’t actually ever develop.
Fighting is condoned, but only in a specified arena where everyone can watch. The crowd decides who’s right and wrong, regardless of the results of the match.