• IGN's Guide
• Sickeder666's Achievement Guide (with videos!)

Found an easy way to get the achievement where you have to last for 10 minutes in a SINGLE fight. Just start a fight with some guards near a group of Vigilantes. They'll be distracting the guards from being able to attack you, so just stick around for the show. You'll know when the 10 minutes are up when the blip of the achievement message pops up. Ta-da!

You could just run away from the fight afterwards... but I prefer to just slash away at those poor helpless guards. mwahahaa xD

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