GLOSSARY

Deformable Terrain: In 3D computer games, the ability to change the environment by modelling the effects of vehicles and explosives on terrain.
Design for Effect: Remembered now as John Hill's explanation for some of the game mechanics of Squad Leader, Alan Emrich defined it as a game abstracting complex procedures for the sake of simplicity, or in his words, "so that the players can get straight to the 'boom'." He added: "That is, when the designer does all the work so the players can have all the fun." 1Emrich contrasted this with Design for Cause which he described as a design that has players following "all of the logical steps and procedures to obtain an outcome."
Design Your Own (DYO): Term used in board wargames to describe either a scenario created for one-time use without historical references. The term can also refer to a system used to facilitate such creation. PC games often have a DYO capability, but the term does not seem to get applied. See Mission Builder.
Die: A randomizer. The most commonly used in wargames is a six-sided die. Clever wargamers have come to know the odds associated of achieving various rolls with two six-sided dice, knowing that there are only 36 possible outcomes. The first game ever released with a 10-sided die was Tanktics, a set of miniatures rules covering armoured warfare in the Second World War.
Dice: Plural of die.
Dice Cup: A small cup used to jumble dice in before throwing to ensure sufficient randomization.
Dice Tower: An object used to facilitate the throwing of dice; uses gravity to jumble dice and provides a small flat surface for the dice to come to rest on and be easily read. Preferable by many to using a box lid or dice cup so as to save space on the table top and prevent wild dice from hitting the game board and displacing counters.
Dog: An unpopular game or scenario, possibly due to a perception it is unbalanced or unwinnable by one side, or because it is simply not fun whether due to poor design or workmanship.
Double-Blind: Playing a board game using two identical copies of the game, with each player able to see only his own copy and those enemy units that a neutral referee determines he is able to see.
DOS-based: A PC game designed to run within DOS (Disc Operating System); that is to say, outside of the Windows environment. The disadvantage of DOS-based games is that other applications cannot be accessed while the game is running.

Notes

1. http://www.alanemrich.com/Class/Class_PGD_glossary.htm

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