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.
My favorite was “Halloween” in Halo 2 multiplayer, kind of a knock off “hide-n-seek” but with a twist.
No shields, no radar, the only weapons were a sword and a pistol, and you only had one life. One player was “Michael Meyers”, that player had the sword and chased down everyone else. All the other players hid while Michael picked you off one by one. Once one player was left, that person became Jamie Lee Curtis and could try to take down Michael Meyers. (To be fair that person should be Dr Loomis or Laurie Strode but it was more fun to use the actor’s name than a character.)
The twist was the music. In Halo 2, you could hear enemy team chatter through the tv speakers and it got louder as you got closer to the enemy. Using that, Michael Meyers would have the Halloween theme song playing so you knew when he was close but you didn’t know where he was. It was truly thrilling, you hear the music, you know he’s close, but not where, the music would get louder and louder as he approached….and then he would walk right by your hiding spot. Or, you’re walking around as the music builds so you know he’s close, you think you’re safe because you have an idea where he is, and suddenly he’s right behind you with a sword in your back.