I went through an addiction with an online game exactly like that. For me what makes online games addictive is having people on there to talk to, or having power like you said. I was involved with a game where I did have a lot of power, where I became a
mod and everything. Spending hours and hours on there was just what I liked to do, but it never did anything for me it just wasted my time and I didn't really care about that. Quitting a game you are addicted to is like smoking, because games force you in because they are a way into an alter-reality. I would start by taking time off the game when you feel you need to, or taking regular breaks or just keeping your mind off of it for a while. In time you will come to realize for yourself if playing this game is really what is best for you, or if you could spend your time doing something much more useful for your life.