My brother takes the characters front Final Fantasy video games and created his own D&D rpg (role play game.) We use different dice. (However you can take a movie or a book and do the same thing.)
If you don’t have dice, you can get the online dice roller, or create papers with actions or numbers. (You can use these paper or dice while writing stories as well: use the dice to determine your characters fate.)
This can help me be creative and work on twisted strategies. I have to go back to the game, and I’m a moogle.