That's it. Who would you rather be: a seasoned warrior just wanting peace for his kingdom and family, or a teenage girl trying to dodge her royal responsibility by running on rooftops at night? Exactly. Playing as Corvo, you are fulfilling your duty to save your daughter and reclaim your land, which is exatly what a true patriarch would do.

If you want to try out Emily's powers, you can start an NG+ after your first walkthrough, her powers will be available to you.

Whether you decided to go low or high chaos, make sure you kill at least some guards on the first level because:

1. They are disloyal dogs, and treachery against family cannot be forgiven (Michael Corleone said that)
2. Corvo must be really pissed off after the outrage Delilah has wrought.

P. S. And obviously don't you ever think of putting Ramsey into Emily's cozy little chamber alive and well.

Despite the previous rule, don't kill when unnecessary further in the game, don't kill civilians and fleeing enemies. Blood thirst is just not Chad at all.

Never kill female guards. If you encounter one in a fight, just pacify her with a sleeping dart (or knock unconcious, but that's the extreme measure). They will rethink their behaviour later.

That doesn't apply to Delilah and her witches because they have stepped beyond redemption by using dark arts for their greed and power lust. However, you can still apply rule 3 to them if you feel generous.

It is not cowardice to use stealth in order to study your enemy. A mature warrior never leaps into battle without knowing his chances.

Attack from shadows to reduce the enemy's numbers, but if you only see one guy, challenge him to a fair fight. Naturally it's not really a fair fight since you're OP Chad Corvo, while he is a virgin guard boy, but hey, he can run if he wants.

Towards the end of the game, you will be coming back to Dunwall tower. If you go up to the secret exit you used to flee the tower at the beginning of the game, you will see a microphone that you can use to give a speech. This opportunity is just too badass to pass up. Proclaim openly to Delilah that you're coming to get her and she can't stop you.

Some witches will come for you after the speech. Do with them as you please.

You don't have time for that crap.