You will find this repack on various torrent or direct download sites (e.g., GOG-Unlocked, SteamUnlocked, or specific scene forums). Look for a file size around (compressed). Do not fall for 2GB "installers"—those are malware.
Ambitions, Late Night, Generations, Pets, Showtime, Supernatural, Seasons, University Life, Island Paradise, World & Store Content : Often includes bonus DLC worlds like Roaring Heights, Dragon Valley, Monte Vista that were originally separate Store purchases. Improved Optimization the sims 3 ultimate collection multi21elamigos
Designed for Windows XP/7 but runs on Windows 10/11 ; however, it often requires community fixes (like the Smooth Patch or Alder Lake fix for newer CPUs) to run stably. You will find this repack on various torrent