There can’t be a single sure shot treatment. Medicines can help but a psychiatrist has to assess you in detail

PUBG is an addiction ( process ) Brain regards it as another addiction like smoking Brain does not know pubg It has a reward pathway which is fired hard

Acceptance is the first most important thing towards any change in life. You are now 29 yrs old. And as per your description you were off pubg for almost more than 28.6 years!!!! OMG!  That it self suggest u can remain off pubg very easily. Try to recall Life before for around more than 28.6 years . There was no pubg,  still you were enjoying ! Few simple things which you can start doing Try to involve with real World rather than virtual mobile games Maintain daily routine with regular sleep and wake cycle, eating pattern Start exercising if you are not doing them now Whenever , u have urge to play the game , try to do other things like playing with kids , doing your expected work , listening music, or any of your hobby, chatting with someone, drawing , writing a journal, cooking etc etc Don't forget to pat yourself with achievement  of smaller goals . Keep a schedule of for how much time you played the game . And how much you are able to curb it down. Keep yourself off mobile phone as much as possible . Limit your urge to use it throughout day and night even use of social media also. With these simple measures I hope you will be able to deal with your so called addiction.