How much of the culture around a game is rooted in its design? That's one of the questions that comes up as Mark takes us on a tour of curling—an Olympic sport that's described as "chess on ice." We examine its origins, the Spirit of Curling, and some specific rules that may have a big impact on how players behave towards one another. Later, Stephen considers some questions about off-ramps, the parts of a game that guide players as they end a play session. Should we as designers encourage players to take breaks?