This is similar to forge in halo, where you build a map/gametype (here mission or simulation) while the idea is great the fact that it took bungie 2 years to come out with a private matches where all you can really do is pick map/gametype/time/points/atmosphere, instead of actual customized game modes (again halo) makes me highly doubt we'll ever see this in D2 let alone D1, excellent concept and no doubt people would make amazing things but unfortunately it just won't happen. [spoiler]We can always dream though...cabal ships are invading and there's a mac cannon just sitting there waiting for someone to use it....[/spoiler]