UNCONSCIOUS
An unconscious creature is helpless, unaware of their surroundings, and cannot take any actions. So long as they have at least 1 hit point, they can still make a Perception check at disadvantage every round to hear, feel, or smell something that would normally draw their attention such as an attacker, battle, etc. If they succeed, they are awakened by the effect. Certain effects may keep a creature unconscious despite their Perception checks.