User blog comment:Master Sima Yi/Assassinews 05-08-'14 – Assassin's Creed: Rogue announced/@comment-5019018-20140911221008/@comment-5174994-20140913123819

It doesn't add challenge, it's just cheap. For example, in the tank mission in ACB, you had to complete it without ever getting hit. But the issue is is that the mission takes about 10 minutes before you get to that part. This means that if you get hit once you had to do the entire mission again. That's not challenging, it's just cheap.