Restore RMAN Level 0 without any archivelogs? I have a level 0 backup, and control files, but I don't have the archivelogs. And I'm not using rman catalog. 

I found ways to restore a L0 backup, if you have at least the first archivelog after the L0, or until the first missing archivelog, but yet I don't find how to restore the database as it was when the L0 was created. 

Is it possible to restore just the L0?
Of course. A consistent full backup created in MOUNT mode does not require any archivelogs to be successfully restored.

An online backup is inconsistent and requires archivelogs for restoring a consistent state.