It is not allowed to use your parents' credit card to buy games online without their consent. This is unethical and may violate legal regulations and family trust. Credit cards are payment tools associated with specific cardholders and are subject to their account management and usage rules. Parents have the right to control and use their credit cards. Unauthorized use is an act of infringing on the property rights of others. At the same time, this behavior also destroys the trust relationship in the family. It is recommended that you communicate with your parents frankly and express your needs for games to see if you can satisfy your desire to play games in an appropriate way with their consent and support, such as using your legal pocket money for consumption.