Every campaign should start with a Session 0. The GM and players talk about the type of campaign they are about to begin, and the GM lays out its framework and setting.
The GM and players should collaborate on details that affect each character, such as their history, family background and prior affiliations. Session 0 builds on those details through a minigame-like activity that lets players establish preexisting bonds, plus information and objectives for the campaign.
It’s also a good time for players to discuss what role they’d like to play in the party (see Class Roles).
At each new tier, the GM should take inventory of the players again, the way Session 0 does at the start.
Session 0 minigame
The minigame for establishing bonds isn’t written yet.