i NEED TO LET THIS WORK OUT… WE BOTH ARE ACROSS THE COUNTY AND ARE WORKING ON THIS GAME BUT NEED TO SEND IT TO EACHOTHER AND OPEN IT UP IN UNITY SO WE CAN WORK ON IT AT DIFRENT TIMES OF THE DAY… SO WHEN HE CAN I WILL… BUT WHEN HE SENDS ME THE FILE AND I OPEN IT UP THERES EITHER NOTHING THERE OR IM NOT GETTING THE WHOLE PROJECT WHAT DO I DO?
First, if you make a copy of the entire project and you are both using the same version of Unity, then sharing the copy will work. I’ve never zipped the results, but I’ve had reason to copy an entire project. If you are not getting all the files then your issue is with how you are zipping or transmitting the file, but it is not a Unity issue.
Second, you can export a package of the project. This will be much smaller. Typically I click on ‘Assets’ in the Project pane, hit ctrl-a, then do Asssets/Export Package… There are a few minor things that don’t come through this way. For example I don’t think icon links in Player Settings comes through.
Third, you can setup a way to share the project. I use SVN. You will need to get SVN server space. When I last looked I saw a couple of places that gave the space away for free if you made your project public. Here is a link on how to setup a project for SVN in Unity:
http://docs.unity3d.com/Documentation/Manual/ExternalVersionControlSystemSupport.html
SVN should work with Unity 4.0 free but will require pro for Unity 3.x.
I know some people share project using another version control system called ‘GIT’.