What is the rules of game 1500 card game?

It seems you're asking about a card game called "1500." However, there isn't a widely known card game with that specific name. There are many card games with varying rules and names that might be mistaken for "1500".

To help me understand what you're looking for, could you provide more information?

For example:

* Do you know any other details about the game? (Like what kind of deck is used, what the goal of the game is, or if there are any specific terms used?)

* Where did you hear about this game? (Did you see it played somewhere, read about it online, or learn it from someone?)

* What country are you from? (Some games are more popular in specific regions.)

With more information, I can hopefully help you find the rules of the game you're interested in.