Difficulty Class (Also called DC) is a mechanic in Baldur's Gate 3. For every Ability Check, the game determines which of the six Abilities is relevant to the task at hand and the difficulty of the task, represented by a Difficulty Class. The more difficult a task, the higher its DC.
Difficulty Class in Baldur's Gate 3
An Ability Check tests a character's innate talent and training in an effort to overcome a challenge. An Ability Check occurs when a character or monster attempts an action (other than an attack) that has a chance of failure.
Perorming an Ability Check
For every Ability Check, the game determines which of the six abilities is relevant to the task at hand and the difficulty of the task, represented by a Difficulty Class. The more difficult a task, the higher its DC.
To make an Ability Check, roll a D20 and add the relevant Ability Modifier. As with other D20 rolls, apply bonuses and penalties, and compare the total to the DC. If the total equals or exceeds the DC, the ability check is a success the character overcomes the challenge at hand. Otherwise, it's a failure.
DC and Skills
Each ability covers a broad range of capabilities, including Skills that a character or a monster can be proficient in. A skill represents a specific aspect of an Ability Score, and an individual's proficiency in a skill demonstrates a focus on that aspect. (A character's starting skill proficiencies are determined at Character Creation)
For example, a Dexterity check might reflect a character's attempt to pull off an acrobatic stunt, to palm an object, or to stay hidden. Each of these aspects of Dexterity has an associated skill: Acrobatics, Sleight of Hand, and Stealth, respectively. So a character who has proficiency in the Stealth skill is particularly good at Dexterity checks related to sneaking and hiding
The skills related to each ability score are shown in the following list. (No skills are related to Constitution.)
Difficulty C1ass Table
|Typical Difficulty Classes|
A passive check is a special kind of ability check that doesn't involve any die rolls. Such a check can represent the average result for a task done repeatedly, such as searching for secret doors over and over again.