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Certain areas are well policed by representatives of Roman law, be they Prefects, Auxiliaries, Legionaries or even Praetorians. In some places it's completely impossible to break the laws; in some places you can attempt it but it's extremely difficult to get away with and in some places you're beyond the reach of the law altogether. This allows for a seamless blend of PvP and non-PvP environments with no real faction restrictions. Obviously Romans have a hard time getting away with crimes committed against fellow Romans - but it is possible in some circumstances. Don't go thinking that anything considered part of the Empire is safe however - even some parts of Italia itself might still be dangerous areas for a lone Roman to visit.
As he flew off Cater looked down at himself and realized that he had turned into a butterfly with a yellow body and yellow and black spotted wings. He didn't look anything like the little green caterpillar he had been before he closed himself up in the cocoon. He landed on a nearby leaf and sat there wondering how he was going to find Pillar since he didn't even know what she looked like any more either. All his life he had known her as a little green caterpillar too. "This is not going to be easy" Cater thought to himself, "How can I search for my sister butterfly when I don't know what to look for?"
There are no character levels in Roma Victor. None. Instead there's the huge, diverse skill tree. There are no level-based restrictions by design or consequence like you'll find in most MMORPG's. You won't be forced to find people of a similar level in order to play in a group and you won't be restricted to certain types of encounter. Of course this also means that you won't be trying to catch up with friends that have played more than you (and therefore 'levelled' faster), or indeed trying to slow your own development and/or 'level up' your friends so that they can come and hunt with you again. Character development in Roma Victor is much more like real life.