Talk:Ghost/@comment-86.1.183.147-20150622153824/@comment-16241899-20150622155219

To my understanding, you are allowed to kill your targets, but only them. I am not entirely sure about this, though.

You are definitely not allowed to restart the mission, it has to be a solid playthrough. You are, however, allowed to continue from an older save within the playthrough if you messed something up.

Difficulty shouldn't affect the achievment.