You're a few decades early with your request.

There are lots of samp rp servers (many russian and romanian, some english) and they look exactly like this game, only with worse graphics, the concept is pretty much the same. You do jobs or choose a career, join a faction, roleplay aroundm follow the rules set by the server and so on.

Hey, I'm from Slovenia too

Since I saw this game will be some kind cops & robbers, I quickly turned off the idea about 'roleplay'. Everyone will want to be either a cop or a criminal, other jobs or however you call them won't be that fun in my opinion. So criminals will rob robbers, kindappers will kidnap kidnappers, hitmen will kill hitmen and cops will try to hunt them down after that. Maybe I'm wrong since the playerbase will be quite huge, but I've played San Andreas Multiplayer where the playerbase is 1000 and it was still a mess.

It's not hard to roleplay for yourself, but not everyone will be willing to roleplay, especially young players and those who never heard of 'roleplay'. I don't think anyone could force you to roleplay, if you want to shoot someone for no reason, you will do it.