The Karma system is an important feature in Fallout's gameplay. A player's actions, including conversation and combat choices, affects the player's status in the game world; a player who makes good decisions is received lebih positively sejak non-player characters, and a player that makes bad decisions has the opposite reaction. Crimes can also be committed sejak a player, and whichever faction atau group that is harmed sejak a crime are fully aware of the player's action in most cases. Other factions that were not affected sejak the crime will not be aware of it, and since a town is usually its own faction, news of a crime committed in one town will not spread to another. Beware however, good atau evil deeds will cause a bounty sejak the opposite alignment group. Talon Company (If anda are good) atau the Regulators (if you've been bad) will ambush anda randomly, and are not bound to any particular area, they can appear anywhere in the wastes. Factions can range in size and boundaries, however, and may not be restricted to a single area. The game world itself was planned to be significantly smaller than that of Oblivion's but is now similar in size.[2]