Downloading Halo 3 varies depending on your internet speed. Average values are given for the most used internet speeds of 50 mbps, 100 mbps and 200 mbps. If your internet speed is lower or higher, you can see how long it takes to download Halo 3 for you from the calculator at the top. With the Halo 3 download time calculator, you can find the answer to the question How long does it take to download Halo 3.