Games are different, and they may teach both good and bad. It depends on your intention and self-control. There are a lot of sport, board or computer games that are good for self-development and improving your skills.
In 1990, I used to play computer games quite a lot. The main thing I finally understood was that they are a waste of life; they destroy our personalities as well as everything we do by causing us to lose self-control. I could have done a lot of useful things in the hours I spent playing computer games. I wish I could turn back time.