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Game balance is a concept in game design describing fairness or balance of power in a game between multiple players or strategic options. A game would be called unbalanced if one or more players have an unfair advantage over the others.
A more complex definition of game balance that critics have described is that, when players have multiple options or routes to victory, most or all of these options are about equally effective or feasible. To be perfectly balanced, each of these options would have to be strategically identical (in which case they wouldn't be substantial choices at all). In a game where various options (such as armies in a real-time strategy game, fighters in a fighting game, or character classes in a role-playing game) have significant qualitative differences between them, the game is balanced if the options are roughly equally likely to lead to success despite their differences. In a suitably balanced game, players would make such choices based on their personal preference, strengths, and playing style, rather than on an inherent advantage in one option. If one option were weaker than the others, then it would rarely be selected by any player and will not contribute to the complexity of the game.
When trying to create a complex or strategically rich game, game designers typically strive to maintain balance by using a careful selection of game mechanics, while offering the greatest possible number of these options, which in turn increases the difficulty of balancing the game. Balanced games are generally more enjoyable, and are considered better-made, than unbalanced ones.
Role-playing games
In role-playing games (RPGs) in which a game master (GM) creates or operates the adventure, one of the GM's duties is to ensure game balance. For example, creating monsters or other adversaries whose abilities are far beyond those of the players is acceptable only if the players have a way to avoid them or do not themselves need to defeat them.
According to books such as the Dungeon Master's Guide for Dungeons & Dragons, players involved in such an imbalanced game are likely to complain of unfairness, and because most of the players' characters might also fail or die before their time, the players often feel that they have little power to influence the game with their choices. Conversely, a game whose imbalance favors the players will most often lack challenge and suspense, and typically the players will eventually feel that there is no point to playing. Players are more likely to feel satisfied by playing when the principles of game balance are applied skillfully. Creating a balanced adventure is one of the challenges of acting as a GM. Most role-playing books that address the issue of being a GM give substantial attention to this issue.
Another aspect of game balance within RPGs is that of balance between the choices made upon character creation, such as race and class. This extends to other genres incorporating RPG elements, such as computer RPGs. Character creation options that lead to ineffective or less powerful characters will largely go to waste if players feel they are not worth choosing. Players who choose them anyway may be frustrated if they feel they are stuck with a character that is inherently disadvantaged, especially after they have invested time and effort in it. Because this aspect of game balance depends most heavily on the rules of an RPG rather than the work of the GM, it is usually the responsibility of the game designer.
Many role-playing game systems, such as GURPS, allowed players to spend character points to help balance character creation, instead of the older random generation method used by Dungeons & Dragons which can lead to severe imbalance between players due to random variation. Often, games force players to pair advantages with disadvantages in order to maintain game balance.
Game balance is less of an issue in less combat-oriented games, particularly modern narrativist role-playing games. In such games, whether a character is weak or strong in some way is less important than whether a character is interesting. The most recent edition of Ars Magica allows players to balance virtues (in-game advantages) with flaws which, while they may make the character's life more complicated, do not necessarily disadvantage them. The indie role-playing game Dogs in the Vineyard takes this a step further: every aspect of the character, whether positive or negative, may be used to the player's advantage.
Multiplayer video games
Balance in a multiplayer video game can be generally determined by whether the skill of a player is sufficiently important in determining who wins; it is balanced if two players of equal skill have equal chances of winning.
Fighting games
Game balance in "versus" fighting games is usually defined in terms of the balance between the fighter characters that players can select. Ideally, the odds between two opposing players should be the same regardless of which characters they select, all other things being equal (and without taking into account the advantage a player might gain from choosing a character that favors his or her individual strengths or playing style). A game would be badly imbalanced if a novice could beat an expert simply because the novice uses an inherently superior character.Real-time strategy
Game balance is a natural consideration in real-time strategy games where players can choose between multiple armies or sets of units with substantial differences between them.
For example, the real-time strategy game StarCraft has been critically identified as exceptionally well-balanced. The three races available to players (Terran, Protoss, and Zerg) are said to be almost perfectly balanced with each other, even though there are tremendous differences in the way they operate and their strategic strengths and weaknesses. There is no clear consensus among expert competitive players of StarCraft that any one race is superior in all cases.
Critical response indicates that the increased strategic depth of a well-balanced real-time strategy game greatly increases the game's enjoyability. StarCraft is a clear example of this, as it is still popular despite being released in 1998.
Action games
There are sometimes circumstances in video games in the action genre in which a player's or team's skill has little effect on whether they win or lose. For example, such imbalance can be caused by one weapon or power-up being so powerful that games are determined primarily by who has access to it.
Imbalance can also be caused by characteristics of the environment that give a large advantage to one kind of behavior or technique (such as camping, according to some); in such a case, game-play is most often dominated by that technique instead of a more interesting range of actions. Players sometimes address such problems by attempts at self-enforced and ill-defined rules such as "no camping", which are often ineffective or lead to arguments between players.
One of the most commonly cited examples of imbalance in action games, especially first-person shooters, is the possibility of spawn camping, which can cause players to be killed before they have a chance to defend themselves. This is a highly typical example of preventing a player from being able to influence the outcome of the game.
Tabletop wargames
Tabletop wargames are often played as a competitive and recreational activity rather than as a pure simulation, so in the former case, a balanced selection of forces for the opposing players is essential. A common way of doing this is through the use of army lists.
Deliberate imbalance
Game designers occasionally decide to deliberately create imbalance for various reasons.
For example, in the multiplayer video game Day of Defeat, the "dod_overlord" map was consciously designed to favor the Axis team, so that more experienced players could play on the Allied team as a means of handicapping. (Another consideration may have been historical faithfulness to the real Operation Overlord.)
In sports games that strive to realistically replicate real-life sports teams, such as the Madden NFL series, each virtual team's capabilities are made to mirror those of the real team, rather than to be necessarily balanced against each other. This is done to make the game a more realistic simulation, and also allows handicapping between players.
In a single-player game, a designer might pit the player against a significantly superior computer-controlled force—one that would be imbalanced in a multiplayer game—to create an exceptional challenge.
"Game balance"