Originally Posted by Jobbercho
I did a rush play through with hardcore mode on, finished the game, but didn't get the achievement.
I did somehow skip/bypass some of the main quests though.
What difficult setting were you on? You made sure to have hardcore on before you left the Doc's house right? I haven't tried it out myself but perhaps you do need to complete every mission? But at the same time I dunno why, I got The went that away achievement just by walking into the Vegas strip so perhaps it's a different factor?