Okay, my mistake. I thought you meant that the game took all the textures and biped models and such from the client disc, sent it to the server, and had the server literally compile the entire map geometry and send a huge map file to the client every time. While everything could possibly be on the disk, the mob spawns and quest data could also easily be server-side. I understand what you're saying now and I agree with you. I bet it is server side, at least initially until it's stored client side until an update is found on the server, since that type of data hardly takes up space and doing it this way would allow for updates and fixes to be applied more easily. Thanks for explaining :)