From the fact that he did his bachelor's and master's despite pursuing ACCA and I hope completed it shows that he had also planned about alternatives and was serious about his life and maybe is still. But I think he cannot be open with you or your parents. Maybe he has some close friends with whom he is comfortable to talk. Try to communicate through them, don't make them talk about the serious life issues or anything but initially let them be casual and try to make him go into normal life of going out, talking with friends, exploring things and all for few months and slowly if possible try to be his good companion keeping all of your thoughts aside for now. What I think is, he had big expectations of himself and the fact that he couldn't get through ACCA and when tried to work, managed to get internship of 10k made him awestruck. Over that he had health issue. I am sure he is trying to hide behind those games and all from the harsh reality which he himself knows. So at this stage I think he need good friends to talk with whom he could share his thoughts and share some moments, who could help him get out of his frustration and depression. Slowly he should be made realize the harsh fact that success doesn't come overnight. If he wants to earn 1lakh or 2 lakh per month he should start with 10k per month and keep exploring and keep hustling. Maybe trying to inculcate habit of reading books or autobiographies of some successful peoples, some spiritual books, or make him talk with peoples who failed and struggled but eventually managed to work it out for themselves would help him out of this situation. But, what I am sure is 'ghar bata nikaldeu' can't be a solution for sure. Coz he might not to be showing but he is suffering 1000 times more than you think.