Sandbox
Definition
A play style where the GM creates a world with locations, factions, and situations, but the players choose what to engage with. The story emerges from player choices rather than a pre-planned plot.
How it works in different systems
OSR: Classic sandbox style. Hexcrawls, random encounters, player-driven goals.
D&D 5e: Often mixed with story. Modules like Princes of the Apocalypse are semi-sandbox.
Blades in the Dark: Faction turns create a living world that moves without player action.
Example
“Here's a map with six adventure locations. There's no 'main quest' - you decide where to go and what to do. The world reacts to your actions.”