Deduction board game are drawn at random. Notable members of this category include "Black Box" and "Master Mind". Investigation games are board games in which the players generally play as police, detectives or other investigators. The best known game of this type is "Cluedo". In fact, many of games in this category utilize a mechanic known as "The Missing Card," which was developed by Anthony E. Pratt for "Cluedo" ("Clue" in the United States). "The Missing Card" takes a known set of cards (or other token) and removes one or more of them. By gathering information and using deduction and logic, the players
Conspiracy (board game) move is revoked. If the defender wins, the move stays and the challenger loses his or her next turn. Players must cooperate against whichever player is closest to victory. Each player can make secret plans to openly swipe the case or murder a spy and completely turn the tables on a player who is close to winning. This game has no dice and no cards so no luck is involved. Players must work together or the game will end quickly. The game was published by the following: Conspiracy (board game) Conspiracy is a 1973 board game made by Milton Bradley.