Stunned: apply its list without adding paralysis

SRD 5.2.1 · Conditions

At the table

1. Apply Incapacitated, including lost actions, speech and Concentration.
2. Automatically fail Strength and Dexterity saving throws.
3. Give attack rolls against the creature Advantage. Check other active effects independently.

Example decision

An attacker within five feet hits a Stunned target. Does Stunned alone turn that hit into an automatic Critical Hit?

No; Stunned does not contain an automatic-critical clause.

Stunned grants Advantage to incoming attacks, but its definition does not include Paralyzed’s automatic-critical rule. A normal critical hit remains possible under the usual attack rules. The distinction changes damage, so announce the condition by name and consult its list instead of substituting a remembered rule for a different condition.

Watch for this mistake

Do not add a Speed-zero clause simply because another disabling condition has one. Stunned includes Incapacitated, which removes actions, Bonus Actions, Reactions and speech, but neither listed condition independently sets Speed to zero.

Ask the table

Which effects are explicitly listed for Stunned, and is another condition adding anything else?

Source rule

While you have the Stunned condition, you experience the following effects. Incapacitated. You have the Incapacitated condition. Saving Throws Affected. You automatically fail Strength and Dexterity saving throws. Attacks Affected. Attack rolls against you have Advantage.

Source: SRD 5.2.1, 189. Online guide.