Check

A Check is used to resolve an uncertain situation. Also known as a "d20 roll" or "roll".

To make a check, roll a d20 and then add the appropriate bonuses to get the result.

Typically, a check is made with an Ability Score as a bonus.

If the relevant Ability Score is your Primary Ability, you also add your expertise die as a bonus.

Check Resolution

The check is successful if the result equals or exceeds the difficulty class (DC) for this check.

Otherwise, the check is considered a failure.

A creature can choose to automatically fail a check if it so desires.

Critical Rolls

A result of 20 (natural 20) is a Critical Success.

A result of 1 (natural 1) is a Critical Failure.