Warrior cats Expansion is Rg in the Warriors world,there are 5 different clans,Thunderclan, Shadowclan,Windclan, Riverclan,and Skyclan. But you can also be in Tribe of Rushing Water,the Kin or even in the Sisters and learn about their ways,you can also make your own clan,tribe,or even a group of different cats with their own afterlife,May Starry Skies guide you!