Pathfinder 2 Flat-Footed Condition
You can find Conditions Rules here.
You’re distracted or otherwise unable to focus your full attention on defense. You take a –2 circumstance penalty to AC. Some effects give you the flat-footed condition only to certain creatures or against certain attacks. Others— especially conditions—can make you universally flat- footed against everything. If a rule doesn’t specify that the condition applies only to certain circumstances, it applies to all of them; for example, many effects simply say “The target is flat-footed.”
Blinded | Broken | Clumsy | Concealed | Confused | Controlled | Dazzled | Deafened | Doomed | Drained | Dying | Encumbered | Enfeebled | Fascinated | Fatigued | Flat-Footed | Fleeing | Friendly | Frightened | Grabbed | Helpful | Hidden | Hostile | Immobilized | Indifferent | Invisible | Observed | Paralyzed | Persistent Damage | Petrified | Prone | Quickened | Restrained | Sickened | Slowed | Stunned | Stupefied | Unconscious | Undetected | Unfriendly | Unnoticed | Wounded