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
Pandemic (board game) in this expansion, including a revised Operation Expert card and a Bio-Terrorist card, which pits one player against the rest of the team. The challenges include a fifth disease, Mutation, which must be cured or not present at the game board when the players score for victory. Another challenge is the Virulent Strain, which makes one disease particularly deadly, replacing standard Epidemic cards with new ones. Each such card represents a special nasty effect that this particular epidemic has on the game play. This is the second expansion, released in the summer of 2013, with a new game board that