[socialist_coder]

You really can't have multiple people working on the same prefabs or the same scene at once. The files are text, so you can merge them, but anything more than just minor changes will not work properly and someone will have to redo their work.

Working on code is fine and your normal guidelines apply to simultaneous work.

I have Unity projects with 3-5 teammates and we don't run into too many problems with scene/prefab merges. Normally each person is working on separate stuff so it would be rare for 2 people to need to touch the same prefab or scene.

If your scenes or prefabs are huge and it becomes a problem then you probably should think about redoing your architecture to keep your scenes and prefabs smaller.