Invisible
Invisible creatures are automatically hidden from view and have total concealment as a result.
Hidden: Hidden creatures have a +2 circumstance bonus on attack rolls against opponents that cannot see them and treat all such opponents as Off-guard.
Stealth: Creatures with total concealment or total cover have a +5 circumstance bonus to Stealth checks. Creatures with partial concealment or partial cover have a -5 circumstance penalty to Stealth checks. Creatures with no concealment or cover cannot attempt to hide at all. The Perception DC to spot a creature with concealment or cover is 10 + their circumstance bonus to Stealth checks, if they are not attempting to hide. If they attempt to hide, they make a Stealth check as normal instead.