Those who played Baldur's Gate or any other turn-based games that didn't play as turn-based are in for a rude awakening, especially if they are unfamiliar with the rules of combat. Moving past enemies during a movement phase (or moving in close to an enemy with a long weapon or reach) leaves characters open for attacks of opportunity, which can do lots of damage (although a high Tumble skill helps in avoiding those). Characters using a bow can take a five-foot drop backwards to avoid penalties in close range shots without affecting the ability to shoot. Familiarity with the rules is not essential, but certainly helps in appreciating all the nuances of the game's capabilities.​