In order to understand writing for a game, one must actually play games. I have over 10 years of progressive game experience. I have watched games like Maplestory turn from a goldmine to a lump of coal. Besides the need for making it pay to win, the biggest downfall was lack of updated content. Don't let your game flop, keep your players engaged. There is a tree to understanding game writing, not everyone can do it however, I can.