GHOST 1.0

For this achievement, as the name implies: you just have to bow to 25 robots in the hallway between the blue and green areas. You don't have to stay in the hallway but you do have to do it in one sitting I believe. What I did was go through the hallway once, take the box back to the beginning and repeated the section.

Sidenote: You only need to bow to the robots that are facing you but can get some extra Konnichi Was by quickly turning to those going the same direction as you and bowing.