The Sims is a longstanding franchise of life simulator games that started with The Sims in 2000. I had the pleasure of playing the original game when I was a teen. My younger sister would lock Sims in houses and set them on fire. I had an artistic lesbian couple I carefully protected and cared for. From the very beginning, it was a fascinating toy that different people played incredibly differently. Some people focused on interior and exterior design, others on character creation. Some carefully fostered family legacies with their Sims. And some left them in a pool to inevitably drown. The franchise was off to an amazing start.
It was incredibly basic compared to future releases. Sims had static faces, their mouths couldn't move, their hands were basically bricks, they couldn't move their fingers. The camera was always isometric, it wasn't really 3D. Still, it was groundbreaking at the time, and developed a fan community very quickly. Sims had 3 life stages: baby, child, and adult. The Sims grew with 7 expansion packs.