I was trying to play the Simpsons Arcade with this setting. I had me thinking if others tried, since the goal is to finish a game in the shortest amount of time. Keep in mind, I'm a newbie on speed runs despite gaming for years, so I had to set some rules. (I'm a 90s.)
Rule 1: If the game has unlimited credits, set the amount and don't add anymore upon starting the game.
Rule 2: If the game as a limit, you can only go as that amount.
Rule 3: If you must, start with one credit. If you die and insert another credit, you must change your character to the next one on the line. You can only go back to the first character after the others. Plus, you have to add the credit to overall score.
Rule 4: This is oblivious. Only games that allow you to choose a character, e.g. the Knights of the Round.
Rule 5: You'll need to count all the credits needed. The lesser amount is okay.
Rule 6: No cheats of any kind, pretty much self-explanatory.
Rule 7: You must list what console you were playing the game. If it's an emulator, it has to be noted. Again, this one is self-explanatory.
Rule 8: In the event of a multiplayer, you can't change rules midway. They had to settled in the beginning and must be as followed. This was inspired by an episode of the Muppet Babies.
Rule 9: You'll need to time your gameplay. How you record the footage is optional. Again, this one is self-explanatory.
Rule 10: Only games with the option of unlimited credits. If you're playing one with a limit amount after the final one, it's game over.
Let know if anyone additional will need to be made.
EDIT: I don't know how to move this aside from copy/paste. Plus, set of rules isn't just the Simpsons.
https://www.speedrun.com/the_simpsons_arcade_game
You should also link the game forum, because there's a chance that they're asking here because they don't know where the specific forum is.