The Sims 4 features a series of exciting challenges for Sims to complete while living out their best life. From the Black Widow Challenge to the Decades Challenges, there are plenty of tasks and objectives to dive into to make your Sims life more exhilarating. One of the best legacy challenges in Sims 4 is the Zodiac Legacy Challenge, which allows players to explore their interest in Astrology and zodiac signs.