Creating a Narrative
The GM determines the premise and background of most adventures, although character histories and personalities should also play a part. Once a game session begins, the players take turns describing what their characters attempt to do, while the GM determines the outcome, with everyone working together to create the story. The GM also describes the environment, other characters' actions, and events. For example, the GM might announce that the PCs' home world is under attack by the Swarm. The characters might fight off the first strike, then track the invaders back to a planetoid in the Vast—just as a jinsul raiding party arrives! The PCs have the choice of battling Swarm emganats, fending off jinsul invaders, or both. Whatever they decide, their success depends on their choices and their die rolls.
A single narrative—including the setup, plot, and conclusion—is called an adventure. A series of adventures creates an even larger narrative called a campaign. An adventure might take several sessions to complete, whereas a campaign might take months or even years!