Genres are not a feature.
Genres are definitions of attributes by which players can group games.
Genres help them understand what they like and what they don t like by providing a common reference. In reality new genres are not created, basic genres are simply mixed. Different elements are played with in different ways that create new styles of play, but the basics remain the same. Genres are like ingredients in a recipe. The early years of games were just like early meals, people ate meats and plants, the basics.