Player Killing
This game is a role-playing mush with the expectation that you are making a well-rounded character with realistic motivations behind their actions. Player killing is allowed if it is in-character, but arbitrary player killing will be met with corrective action.
If a heat-of-the-moment situation turns into combat, you MUST contact staff and wait for staff, even if you are fluent with game mechanics. That staffer can choose to run the combat, or give players permission to adjucate themselves. This is because we are a yes-game with a culture of trusting players. However, the instant that any player wants staff to be involved again, staff must be involved.
In the case of planned antagonism (hired killings, ambushes, planting traps/bombs, etc.) you MUST go through staff, end of story, there is no "a staffer might decide you two are aright to duke it out live". Put in a +request. Let staff know. Do NOT move forward until you have a response from staff acknowledging that they read the +request. If they leave instructions, follow them. If they require you to perform a scene to accomplish the task, you must perform that scene.
PRP runners do not have access to staff notes and thus cannot step in for staff when staff is required.