Garreg Mach

Demoman: Sets up one explosive per round in one area, if someone targets someone in that area, they die instead of the target.

 

Scout: Searches around one area, finds out who committed a crime in that area if a crime happens there. Only finds out results after scene is up.

 

Soldier: Is able to kill someone every two rounds, however, if they are not a killing role, they are not affected by the shot.

 

Heavy: Is able to either kill someone who targets the person with the role, or sacrifice protection from anyone for 3 rounds, to kill anyone they choose.

 

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That work? =)

I like the idea for the Heavy, and with some preparation the Demoman could certainly work. I'd be a little worried about the Scout, though it does make sense, however, I'm not sure about the Soldier.

I was more or less just randomly thinking that one up. =P