FLAT-FOOTED
A creature is flat-footed if they're caught off-guard, flanked, prone, or otherwise unable to defend from attack. A flat-footed creature is staggered 1 and have a penalty to CMD and Reflex equal to this condition's value and a penalty to all other defenses and saves (AC, Fortitude, Will) equal to half this condition's value (rounded down).
Note: Many effects can make a creature flat-footed against only specific targets. This means that they suffer this condition, only during that target's turn or against that target's attacks.