Updated for the latest patch which broke many custom traits and other updates - see this post for details. The Sims 4 Mod Constructor is a downloadable program that allows users to easily create mods for The Sims 4 in a user-friendly environment, including traits, aspirations, social events, lot traits, holiday traditions and more! DOWNLOADĭOWNLOAD SOURCE CODE (only download if you know what you’re doing)ĭOWNLOAD MORE ICONS (in order to keep the download size to a minimum, these are included as a separate download)