User blog comment:Kabutsu/Assassin's Creed IV: Black Flag - Spoiler-Free Review (Xbox 360)/@comment-5546424-20131112005441/@comment-4829046-20131113040154

At least I can manage without being detected. In the games prior, you got detected instantly on the roofs and they would hear you or see you from the corner of the eye when you try to assassinate them. I loved how in ACIVBF the guards aren't that fine tuned in their senses to turn around when you run up to them thus making running assassinations a lot easier, yes that factor was there in AC3 as well but it wasn't as good since the guards were still psychic and every guard for miles would show up if you did a running kill.