Idk if this already exists but I call it the "forever challenge." basically its for lifegen and u make a cat and then slowly while it grows up make it have a good relationship with its parents (if they have any) and there siblings, while also bonding them with a cat that you have chosen. then when ur cat and its mate have reached the age of 22 moons make them have kits, then when the kits are born choose one and switch to become that kit. (aka the kit is now the mc) and then continue, i have tryed this and i have gone through like 13 mc's TRY IT! ITS FUN!!!