For example, can 2 people create a game in the same Unity editor?
Because, if it is true, then I need someone to help me making my project.
Like, someone entering in my editor, and making the project with me.
If you uderstand my doubt, then answer: Can 2 or more people enter in one editor?
I suggest you read the license agreements. It’s pretty common to refer to “seats,” the places your developers are assigned to work.
If you’re using the computer in the morning and your brother is using the same computer in the evening, then sure, you’re both using the same “seat” to develop the game.
If you’re using the computer directly and somehow your friend is remotely logging into your computer and trying to use your Unity installation at the same time, that’s not covered by one “seat” per the license (and there are technical challenges to get that to work anyway).
If you both download Unity and want to work on the same files with both of your computers to make a project collaboratively, then you need to look even more closely at the agreements, because that’s two “seats.” The fact that you both downloaded the free community edition of Unity is fine (assuming you’re not raking in the revenue). Your own game files can be shared back and forth between you and your partner, and you have to set up your own means of doing so, such as setting up a git repository or some other kind of shared folder. Typically the various assets need to be downloaded directly from the Asset Store to each computer, and those are almost always licensed “per seat” so you’d incur the cost of those assets twice. If you had five people on a project, that’s five seats for each Asset Store asset you want to work with.
That may sound expensive and it definitely can get expensive to operate within the rules. That said, remember if you have five people on one project and the same five people on a second project, then you all can continue to use the same five seats of asset licenses on both projects. The more you re-use assets on multiple projects, the more economical they are.
Time zone has nothing to do with it. If it’s a separate computer used by a separate person, it would count as a second seat. Assigning/reassigning licenses is not a solution.