If you want a complete character mod, you’d probably prefer playing Sims 4 than Sims 3. Note: This mod requires NRaas Career Mod and World Adventures expansion pack. The lowest being a white belt, and the highest being a black belt. The ninjas will work Monday through Friday in the evening and they have different ranks corresponding to their belt color. With this mod, it allows that dream to become a reality for your sims, by adding a ninja career to the game. Many of us as a child wanted to grow up and be a ninja, they are super cool and they fight off bad guys and have other noble duties.