Strategy games are typically board games, video or computer games with the players' decision-making skills having a high significance in determining the outcome. Many games include this element to a greater or lesser degree, making demarcation difficult. It is therefore more accurate to describe a particular game as having a degree of strategic elements. Strategy (and tactics) are usually contrasted with luck, games exist on a continuum from pure skill to pure chance. Turn-based The term "turn-based strategy game" (TBS) is usually reserved for certain computer strategy games, to distinguish them from real-time computer strategy games. A player of a turn-based game is allowed a period of analysis before committing to a game action. The most notable games of this genre are the Civilization, Heroes of Might and Magic, Jagged Alliance, Total War, Master of Orion and X-COM series. Almost all non-computer strategy games are turn-based, with the notable exception of Diplomacy [edit] War game War games are an attempt to simulate a hypothetical battle. Players will have to consider situations that are analogous to the situations faced by leaders of historical battles. As such, war games are usually heavy on simulation elements. Some games of this type will use physical models of detailed terrain and miniature representations of people and equipment to depict the game state. A popular wargame with physical models is Warhammer 40,000. Diplomacy and Global Diplomacy are also strategic wargames.