Sneak Attack

Effect: 

Once per round when you make a rogue melee weapon attack against an enemy engaged with one or more of your allies, you can deal extra damage if your attack hits.

Rogue Level Extra Damage
1 +1d4
2 +1d6
4 +2d6
6 +3d6
8 +5d6
10 +7d6
Adventurer Feat: 

Your Sneak Attack feature also works the first round of combat against enemies with a lower initiative than you.

Champion Feat: 

Your Sneak Attack feature also works against enemies who are confused, dazed, stunned, vulnerable to your attack, or weakened.

Epic Feat: 

Once per battle when you miss with an attack that would have allowed you to deal Sneak Attack damage, replace the normal miss damage with your full Sneak Attack damage.