this is sick, so many people have been waiting for this for years.
I made this picture in Forge literally 11 years ago lol and it got almost 120k downloads on Halo 3's file share system. There were entire sub communities in Halo 3 for custom games, screenshotting, obstacle courses (Sarkathlon), machinima, and even jumping (look up LBYL 2 on YouTube) etc. It was legitimately ground breaking, at least for console players
You could share maps, screenshots, or clips on your profile with the file share system, so good content spread unbelievably fast. It was so fun man