Unity is supposed to support cloud multi-user editing, but I bet it would require the pro version and I'm not that dedicated to pay 75 dollars a month or the full 1500 to go pro. 
After I plunked around with the rollerball tutorial I found that there was a fully completed ball that included a jump feature that you can use right in the unity standard character objects.
After I plunked around with the rollerball tutorial I found that there was a fully completed ball that included a jump feature that you can use right in the unity standard character objects.
