A five year old addicted to video games
is not unusual. If they are around video games
the majority of the time, that is what they will do. If you dont like him playing, take it away...plain and simple. He might not know how to play at first. And, it sounds like he is the only child in the house. So, he doesnt have that other interaction to help him learn how to play...except for you. So, my suggestion is to get him a new toy...and put him in his room by himself to learn how to play.