Session Zero

Session Zero brings the players — not their characters — together before play begins, to ensure that everyone arrives at Session One from the same position: a shared understanding of the world, calibrated expectations of play, and characters built together rather than assembled in isolation and forced into proximity afterward.

The ceremony is a considerable investment of time and effort, primarily by the GM but by the players as well. It pays back in alignment: better shared expectations of what the campaign will demand, a stronger instinct for collaboration, and character relationships that feel established rather than invented on the spot. The crew dynamic that takes some groups months to find tends to be present from the first session. Players leave Session Zero with swords sharp, packs equipped, and a shared agreement about where they are going and what they are taking on.

Session Zero recurs whenever a new campaign begins and whenever a new player joins an existing crew. The second use is treated in detail below.

Before Session Zero, the GM must settle one question above all others: at what level do the characters enter play?

This determines what the characters have already survived and what the world expects of them. Even a first-level crew is not starting from ignorance — every character has grown up in the setting and carries the background knowledge that implies: the significance of oaths, the shape of local politics, the presence and character of the gods, and the pressures bearing on the region they come from. What first-level characters lack is adventuring experience, not cultural formation. A higher-level crew carries additional history — events the campaign will never show directly but that the players must be able to roleplay credibly. The entry level fixes what counts as accumulated knowledge for these characters and drives what the GM must prepare.

The sequencing of Session Zero is not incidental to this. Covering the world, the setting’s pressures, and the campaign’s starting circumstances before character generation is deliberate — players who understand the context will make different capability choices than players who heard nothing first. The world orientation segment actively shapes what the crew becomes, and the GM should treat it as such.

Session Zero has three objectives. All three must be met.

The GM is strongly advised to produce a briefing document for Session Zero — a written exhibit that players read before the session, refer to during it, and keep afterward.

The document should cover at minimum: the world’s tone and material conditions; the significance of oaths and obligation; the entry level of the campaign and what it implies about character knowledge; the starting location and its immediate context; the factions and pressures the characters will encounter early; and any campaign-specific rules departures that players need to know before generating characters.

The investment is significant the first time. After that it is modest — the core world material does not change between campaigns, and only the campaign-specific sections require updating. A well-constructed briefing document is reusable indefinitely across campaigns sharing the same setting.

The document is not a gazetteer or a history. It is the minimum a player needs to generate a character that fits and to arrive at Session Zero ready to make decisions. Distributing it in advance is not optional — players need time to absorb it, and the session itself should not be carrying that load.

When a new player joins a campaign in progress, Session Zero recurs in full. The new player’s need for information is not less than that of the founding members — it is often greater, because the founding members absorbed context across the early sessions while the new player must receive it all at once.

There is one advantage the founding crew retains that cannot be replicated: they shaped the crew together. They negotiated Actor types, identified capability gaps, and agreed on what the crew needed before anyone committed. A player joining mid-campaign inherits a crew that already has its shape and must fit into it. The GM and the attending players should therefore be explicit about what the crew currently lacks and what would serve it well, so the new player can make an informed choice.

The onboarding Session Zero also gives the new player their primary creative agency in joining: the manner in which their character enters the crew. The shape of the crew is fixed, but how the new character arrives — the circumstances, the introduction, the reason they are accepted — is open, and the new player should be encouraged to propose and develop this in the session rather than having it handed to them.

Full-crew attendance at an onboarding Session Zero is ideal but not always practical. A well-chosen subset often serves the purpose as effectively — the players whose characters interact most directly with the capability gap the incoming character will fill are the most useful attendees. The GM should select attendees with the new player’s orientation in mind rather than defaulting to whoever is available. Players who attend also benefit: it is a useful occasion to revisit world material that may have faded.

The aim is parity of understanding. A player joining at session twelve should arrive with the same grasp of the world and their character’s place in it as players who have been at the table since session one. The shared history of those sessions accrues through play and cannot be shortcut — but the world-knowledge gap can and should be closed before the new player sits down for the first time.

The one circumstance where Session Zero need not be observed is for one-off or demonstration games — sessions where time and attention are at a premium and the primary purpose is to get people playing quickly rather than to launch a sustained campaign.

Skipping Session Zero in these cases is expedient, but it does not eliminate the work. Most of what Session Zero delivers still needs to happen — characters still need to be situated, expectations still need to be set, and the world still needs to be explained well enough for play to proceed. What skipping the ceremony actually does is move that work into the session itself, where it competes with play, takes longer under pressure, and produces worse results. The benefits Session Zero is designed to generate — shared understanding, calibrated expectations, characters that belong — are simply not produced, and the table feels the absence even if nobody names it.

For any game intended to continue beyond a single session, the investment in Session Zero pays back faster than it costs.

Ultimately, whether to offer a Session Zero and whether to attend one are decisions for the GM and players together. Experience has shown that with a little forethought from the GM and the willing participation of the players, a well-conducted Session Zero can produce from the outset what otherwise takes many sessions to develop — a functioning crew dynamic, a set of characters with compatible aims and complementary capabilities, and a crew whose members have plausible personal dynamics with each other. No crew worth playing is filled with individuals who agree on everything, and Session Zero is the natural venue to establish that Grog thinks religion is a scam, or that the mage and the priest have history, before those tensions are created out of thin air mid-session — or worse — imposed on them as a plot device by the GM.

These dynamics cannot be imposed after the fact. A GM who introduces interpersonal friction as a plot device — engineering tension between characters to create texture — is doing something the players did not agree to, and it shows. Nobody wants to play out a GM’s idea of a conflict or an alliance they did not choose. The difference between a crew with genuine internal tension and one whose conflicts feel manufactured is almost always whether the players built those relationships themselves, at Session Zero, before anyone picked up a die.