Playerís Handbook, page 188
Replace all text after the first paragraph with the following:
Stealth: At the end of a move action.
✦ Opposed Check: Stealth vs. passive Perception. If multiple enemies are
present, your Stealth check is opposed by each enemyís passive Perception
check. If you move more than 2 squares during the move action, you take a Ė
5 penalty to the Stealth check. If you run, the penalty is Ė10.
✦ Becoming Hidden: You can make a Stealth check against an enemy only if
you have superior cover or total concealment against the enemy or if youíre
outside the enemyís line of sight. Outside combat, the DM can allow you to
make a Stealth check against a distracted enemy, even if you donít have
superior cover or total concealment and arenít outside the enemyís line of
sight. The distracted enemy might be focused on something in a different
direction, allowing you to sneak up.
✦ Success: You are hidden, which means you are silent and invisible to the
enemy (see ďConcealmentĒ and ďTargeting What You Canít See,Ē page 281).
✦ Failure: You can try again at the end of another move action.
✦ Remaining Hidden: You remain hidden as long as you meet these
Keep Out of Sight: If you no longer have any cover or concealment
against an enemy, you donít remain hidden from that enemy. You donít need
superior cover, total concealment, or to stay outside line of sight, but you do
need some degree of cover or concealment to remain hidden. You canít use
another creature as cover to remain hidden.
Keep Quiet: If you speak louder than a whisper or otherwise draw
attention to yourself, you donít remain hidden from any enemy that can hear
Keep Still: If you move more than 2 squares during an action, you must
make a new Stealth check with a Ė5 penalty. If you run, the penalty is Ė10. If
any enemyís passive Perception check beats your check result, you donít
remain hidden from that enemy.
Donít Attack: If you attack, you donít remain hidden.
✦ Not Remaining Hidden: If you take an action that causes you not to
remain hidden, you retain the benefits of being hidden until you resolve the
action. You canít become hidden again as part of that same action.
✦ Enemy Activity: An enemy can try to find you on its turn. If an enemy
makes an active Perception check and beats your Stealth check result (donít
make a new check), you donít remain hidden from that enemy. Also, if an
enemy tries to enter your space, you donít remain hidden from that enemy.