Missions are endeavours into the world to achieve some goal. They will consist of:
A brief, sent out in advance by the GM
A player party, of characters taking up the call
A monster party, representing the various adversaries and other NPCs that the player party will encounter
An opportunity for player characters to gain pre-Mission briefs from Background abilities
Around 12 Encounters in uptime during which the plot unfolds
Downtime afterwards during which the player characters can act based on the Mission
A Mission report detailing the outcome written by the GM