Seems a bit excessive to ban everything all together and I wouldn't expect such a law to last long. Too much gaming is harmful for sure, but in moderation it's just a hobby like anything else. Besides, it's the responsibility of parents to put limits on the game time.
Some games can also be too much for kids, but it's also the responsibility of parents to make sure their kid only engages with age-appropriate content. I feel like this is to throw a bone to no-good parents who can't parent their kids to make saying no easier to them. So many people who absolutely should not have kids!
Banning something outright is absolutely silly. Ever heard of the Streisand effect?
I recall when the PMRC went on a campaign to push the recording industry to put "Parental Advisory" labels on record albums that were deemed to have "offensive content." In other words, anything that could possibly cause offense warranted a label on the record. The result, we still bought these records because we knew something edgy was going to be on the album. It stopped be so much as a warning as it became unintentional marketing..
Plus, we're talking about Edrogan here... You think the Turkish government now in power is doing this to protect kids? Hardly. They just have a convenient excuse to throttle possible exposure to something other than the official narrative, the classic "think of the children" fallacy.
Let's face it.... Young people are largely online these days. When I was a teen socialized with my friends at school, shows and parties. It's different now, Online gaming, social media, and the like are how most young people stay connected, for better or for worse. As a parent, there is nothing wrong with limiting screen time, or restricting certain media. But, we have to balance. Too much oversight, and you have kids who become socially awkward because they can't relate with their peers. Too little, and kids are exposed to all sorts of harm. The conundrum of our times, I guess.