A session zero is a pre-campaign meeting where the whole group sits down, before any real play begins, to align on tone, content, schedule, characters, and table rules. Think of it as the planning session that comes before "session one." Nobody fights a goblin or rolls for initiative. Instead, you agree on what kind of story you are about to tell together, and how you want it to feel.
It is one of the most useful (and most skipped) parts of starting a new tabletop RPG. The good news: it does not have to be long or formal. A focused chat over snacks does the job.
Every player walks in with a picture in their head. One imagines a grim survival horror; another expects heroic high fantasy with witty banter. Without a session zero, those pictures collide mid-campaign, and someone ends up disappointed.
A session zero prevents mismatched expectations. It sets a shared vision so everyone is excited about the same thing. And it makes the campaign smoother because you have already answered the awkward logistical questions, so you can spend real sessions actually playing.
In short: a little planning up front buys you a lot more fun later.
You do not need to discuss everything, but here is a solid checklist to pull from:
Writing these decisions down helps. Mini Kraken's shared notes and handouts give you a simple place to record what the group agreed on, so "wait, did we allow homebrew races?" never derails a session later.
Safety tools are simple, agreed-upon techniques that keep content comfortable for everyone at the table. They are not about censoring the story; they are about making sure the story stays fun for real people. Here are the most common ones.
Lines and Veils. A line is a hard "no" — a topic the group agrees will never appear in the game at all. A veil is a topic that can exist but happens off-screen, fading to black rather than being described in detail. You set these together, and you can add to them as you go.
The X-Card. Popularized by designer John Stavropoulos, the X-Card lets anyone tap a card (or raise a hand, or say "X") to signal that a moment should be edited out or skipped, no explanation required. Play simply moves past it. It is a quick, low-friction way to pull the brakes.
The Open Door policy. A standing agreement that anyone can step away from the table at any time, for any reason, with no judgment. Need a break? The door is always open, and you are always welcome back.
Used together, these give players easy, respectful ways to steer content without halting the whole evening.
A common myth is that safety tools are only for dark or mature campaigns. Not true. They help any table, including cheerful, comedic ones.
Why? Because they build trust. When players know there is a clear, blame-free way to flag discomfort, they relax and engage more boldly. Ironically, good safety tools often lead to braver, more dramatic storytelling, not tamer play. They are a small investment that makes everyone freer to dive in.
A few neighboring concepts worth knowing:
Run a session zero, pick a couple of safety tools that fit your group, and you will start your next campaign on solid, shared ground. Then go roll some dice.