Session Zero, and Session Zero
Session Zero is a card-based solo character creation game. It is, in short, a quick and easy journaling game to build a creative backstory. You draw at least five playing cards from a shuffled deck, and based on the prompts you write out significant moments in your character’s history before the beginning of the game.
It’s called Session Zero, because that’s what a session zero is. As a gaming term, session zero is, natch, what comes before the first session. It is, in essence, the prologue to the game.