Share your own game rules you have made up that are not the way the game was originally meant to be played.
One that I remember is in “Monster Jam” for the Nintendo Wii, there is no free roam but you can play a “destruction mode” that has a time limit but works good enough. There is a map where you can go up on a roof and the goal is to push the other ones down being the last one standing when the time hits 0. That’s it. It was inspired by an flash game with the title “one must fall” I believe.
We played this a lot. Its funny how you only need a “interesting” physics engine for a game to be fun.
I invented a game called Horse Toss on Minecraft. I don’t know if you can still play it, but it used to be the fishing rod pulled exponentially based on the distance, so at like 60 blocks above the mob you hook, the mob would fly about 90 blocks into the air. From there, knock back would throw mobs at an angle depending on where you were when you hit them. If you’re below them, they fly in an arch.
You go up on a tall platform with a fishing rod enchanted with knockback 5, pay a diamond and it would dispense 8 horses in a pool below you. You hook the horse, yank it into the sky and try to wack it as it comes down. The pool catches it if you miss so you always have 8 tries. If you hit the horse, it lands in an area in the distance with pressure plates that dispense valuables for for score. The horse dies on impact 99% of the time but of it doesn’t it can wonder around and get you a bigger score. At the end, you trade the rod in to get your loot and you can keep the horses if any survive.
Honestly, Minecraft was great for arcade style games. Archery galleries, that snow bock game, staged arenas, roulette, hell my brother made a system that used Shulker boxes and redstone to deal playing cards so you could play poker.