It's quite simple, I tried to stop completely countless times, and it didn't work. I also tried moderation countless times, without success ^^
But recently, the addiction is less strong, it's not that exciting anymore. My main game became boring for me 1,5 year ago, but I used other games during ~1 year.
I tried again to quit games, but it didn't work, I always had this FOMO (fear of missing out).
So I think moderation could be possible. And it works very well so far, in the last 18 days (when I started moderation with new rules : 30min-1h max during the week, 2h max during the WE, some days without game), I didn't play 50% of the days ! Before it was nearly impossible to spend a day without gaming.
During these 18 days, I only slipped 2 days (2h instead of 1h during the week, 3h instead of 2h during the WE), so it's not that bad for me. This allows small failures, instead of quitting, where a fail means (in general) starting all over, it's quite demotivating.
So, I did what I wanted to do : no game last Monday night and yesterday, that wasn't easy ^^