How do you convince your own cousin to give you back what if your Computer Game game when he took it just because you didn't clean what if your room on time?

Answer 1

Tell your cousin that if he doesn't give your game back, you will ring the police and have him charged with Theft. I bet he will give your game back. If he calls your bluff, then ring the police and report it stolen.

Additionally depending on what age you are, for instance if you are adolescent, you can just get your parents to sort it out through their related siblings (Your Aunt and Uncle) to get your game back without making things serious over a game.