Board-less games are by far the most common type of tabletop game. There is no board, so there are no restrictions placed upon the setting. If the story takes them into an office block of a mega-corporation, or into a cave, or onto a field then the characters are free to go there and interact with whatever they find there.

The storyteller (or game master) must describe the scene to the players and then they can make decisions and choose actions based upon what the characters can "see". Often the storyteller will make quick and impromptu diagrams to help the players visualize a scene.