The Sims Legacy Collection

The Modding Guide

Everything you need to mod, customise, and bring new life to The Sims Legacy Collection (2025)

✓ Patch 1.122 Compatible ◆ Legacy Collection 2025 Updated March 2026 Windows 10 / 11

Welcome back to the neighbourhood! The Sims Legacy Collection launched in January 2025 and with it, the old modding community has sprung back to life. Almost all classic Sims 1 mods (2000–2003) still work, and new mods are being created specifically for the Legacy Collection.

🔬 What's Possible What the engine can and cannot do, and what mods are possible 📁 Installing Mods Folder paths, file types and step-by-step installation 🌐 Download Sites Best active mod sites confirmed working in 2025 ⚙️ Must-Have Mods QoL hacks, bug fixes, objects and gameplay improvements 🎮 Cheat Codes Every working cheat for the Legacy Collection and how to use them 🎨 Creating CC Custom skins, clothing, hairstyles, walls and floors 🔧 IFF Hacking Build your own gameplay mods and object hacks 🛠️ Troubleshooting Fixes for common mod problems and errors 📖 Terminology What CC, mods, hacking and other Sims 1 terms actually mean 📋 Updates & Roadmap What's changed recently and what's planned next ✉️ Contact Send corrections, suggestions or report broken links