Description
Players have a special ability that they can use one time per game.
Discussion
While there are exceptions, Once-Per-Game Abilities are usually different for each player or character. Because they can only be performed once, the designer has great latitude to make them very powerful. These two characteristics combine to make this mechanism potentially be player- or character-defining. The threat of using the ability, the decision of when to actually use it, and identifying the correct moment can dominate the play of the game as players maneuver for advantage and can elevate the available strategies and tactics. It also adds another dimension of consideration for players—timing—that is not present with always-on special abilities. In Warmachine/Hordes, each side has one Warcaster who has an extremely powerful single-use ability called a Feat. When and how to use the Feat is a critical part of the game. As such, when characters have wildly varying special abilities as in Warmachine/Hordes, it is important that players understand exactly what their opponents are capable of doing. This rewards
veteran players and puts a burden on new players to understand the full extent of the special Action. Some games give players a set of special Action tokens at the start of the game, which are usable one time during the game. These may be the same for each player, such as Finca. Often, if tokens are not used, they give bonus Victory Points to the player at the end of the game.
Sample Games
Battles of Westeros (Kouba, 2010) Battlestar Galactica: The Board Game (Konieczka, 2008) Drakon (Jolly, 2001) Finca (Sentker and zur Linde, 2009) Warmachine/Hordes (McVey, Snoddy, and Wilson, 2003)
描述
玩家拥有一种特殊能力，每场游戏可以使用一次。
讨论
虽然也有例外，但“每局一次及其它”能力通常对每个玩家或角色都是不同的。因为它们只能执行一次，设计师有很大的自由度使它们非常强大。这两个特征结合起来使得这种机制可能成为确定玩家或角色性质的关键。使用能力的威胁、实际使用的时机的决策以及确定正确时刻可能会主导游戏的进行，因为玩家为优势而机动，并且可以提升可用的战略和战术。它还为玩家增加了另一个考虑维度——时机——这是始终开启的特殊能力所不具备的。在《战争机器/部落》（Warmachine/Hordes）中，每一方都有一个战争施法者，他拥有被称为“壮举”（Feat）的极其强大的单次使用能力。何时以及如何使用壮举是游戏的关键部分。因此，当角色拥有如《战争机器/部落》中那样差异巨大的特殊能力时，玩家准确了解对手能够做什么是非常重要的。这奖励了
老手玩家，并给新玩家带来了理解特殊动作全部范围的负担。有些游戏在开始时给玩家一套特殊动作标记，这些标记在游戏中可使用一次。虽然对每个玩家来说可能都是一样的，比如《芬卡》（Finca）。通常，如果标记未被使用，它们会在游戏结束时给予玩家奖励胜利点数。
游戏范例
Battles of Westeros (Kouba, 2010) - 《维斯特洛战役》 Battlestar Galactica: The Board Game (Konieczka, 2008) - 《太空堡垒卡拉狄加：图版游戏》 Drakon (Jolly, 2001) - 《达肯》 Finca (Sentker and zur Linde, 2009) - 《芬卡》 Warmachine/Hordes (McVey, Snoddy, and Wilson, 2003) - 《战争机器/部落》