Perception
DC Base: opposed Stealth check (notice a creature using Stealth)Check Frequency: per use
Success: you notice the opponent's Stealth attempt
Failure: your opponent may sneak passed you undetected or take other actions
Time: no action
Notice Fine Details
DC Base: -10 (hear the sound of battle)DC Base: -10 (notice the stench of rotting garbage)
DC Base: 0 (detect the smell of smoke)
DC Base: 0 (hear the details of a conversation)
DC Base: 0 (notice a visible creature)
DC Base: 5 (determine if food is spoiled)
DC Base: 10 (hear the sound of a creature walking)
DC Base: 15 (hear the details of a whispered conversation)
DC Base: 15 (find the average concealed door)
DC Base: 20 (hear the sound of a key being turned in a lock)
DC Base: 20 (find the average secret door)
DC Base: 25 (hear a bow being drawn)
DC Base: 25 (sense a burrowing creature underneath you)
DC Base: opposed Sleight of Hand check (notice a pickpocket)
DC Base: by trap (find a hidden trap)
DC Base: 15 + the potion’s caster level (identify the powers of a potion through taste)
DC Modifier: +1 per 10 feet (distance to the source, object or creature)
DC Modifier: +5 (through a closed door)
DC Modifier: +10 (through a wall, per foot of thickness)
DC Modifier: -2 (favorable conditions, according to appropriate sense)
DC Modifier: +2 (unfavorable conditions, according to appropriate sense)
DC Modifier: +5 (terrible conditions, according to appropriate sense)
DC Modifier: +5 (creature making the check is distracted)
DC Modifier: +10 (creature making the check is asleep)
DC Modifier: +20 (creature or object is invisible)
Success: you notice the detail
Failure: you fail to notice the detail
Time: move action when actively searching
Final Notes
Bonus In: +2 elfBonus In: +2 half-elf
Bonus In: +2 gnome
Bonus In: +2 halfing
Bonus In: +8 creature has scent ability
Bonus In: +8 creature has tremorsense ability
Bonus In: +3 spell caster with a hawk or owl familiar
Bonus In: +2 Alertness (feat)
Bonus In: +4 Alertness (feat) + Perception (10 ranks)
Bonus In: +2 favored enemy
D20: Listen + Search + Spot
