Mod The Sims MTS Sims 4 TheLovelyGameryt trait. That means that mods are essential to the experience, as it is an older game at this point and many of the vanilla features can seem outdated. I just making some mod for the sims 3 and sims 4. So, the first thing you have to do is download Sims 4 Elements mod. It alters the rate of Need decay for each age, causes Child Sims to get occasional Playful Moodlets (of random strength between 1-3) and Teen Sims to get Sad, Angry and Flirty mood swings (again, random strength This one, this mod, and this one are another among the incredibly useful, must-have mods within the greater umbrella of Sims 4 mods. This mod is perfect for those looking to get some new animals in their life. Note that the mod has been built against Aequivaleo 0.