[quote=NuttsnBolts]

Would I be right in saying that you're concerned about player interaction between each other? ie: People staying in one group of players or when they meet another group, being forced to have a confrontation?

I think that can be worked around. People don't have to fight all the time and they can be civil to each other. Two of the families, Hudsons and Aristocrats, did work together at one point for a common goal so they can still utilise each other if need be. Children of Umbra are also secretive and stealthy so they can blend in fairly easily.

I was also going to start off the story with a murder mystery so the question will be who did it, which may force players to confront each other to gather information. Therefore the worse thing you could do is shoot first, ask questions later.

[b]EDIT:[/b] I can also post up the OOC here later after some interest is generated to see what people think and to help discuss it before it all goes official.
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Yes, my main concern would be how everyone's character would be able to interact despite having split factions within the group. In the case of a murder mystery, would everyone be at a party or gathering and that's why they work together? It seems like, otherwise, that's a matter that would be taken care of by local police (or some derivative thereof), right? It feels like, outside of the traditional "whodunnit" mystery party, the only strong motivation each family could have for personally investigating would be: a) the victim was an important person and no one is satisfied with the ongoing investigation, b) the murder happened outside of the local authority's juristiction, or c) each character is a member of the local police/authority.

As just a thought, is there potential for other common goals? Since the mine seems vital to the city's prosperity, having trouble there would be ample reason for multiple families to fix the situation. Or maybe troubles with another city-state crop up and they need to investigate?

I know I'm being a bit premature here, but I do find your ideas intriguing.