The Sims 3 is a massive game; the base game alone requires about of space, and a full installation with expansions can exceed 30 GB . Compressing a 6GB+ game down to 100MB (a 98% reduction) is technically impossible while keeping the game functional. Why you should avoid these downloads:
This is the most common result. The 100mb file installs a fake launcher. You click "Play," and nothing happens. Meanwhile, in the background, the installer has changed your browser homepage, injected ads into your Google searches, and installed "PC Optimizer" software that you cannot delete. Your game doesn't exist, but your pop-up ads do. Sims 3 Highly Compressed 100mb Download
Install the "Sims 3 Smooth Patch" by Lazy Duchess. This patch fixes the game's famous stuttering and allows it to run better on low-RAM systems. It does not increase file size. The Sims 3 is a massive game; the