First of all, here is the world map kindly provided by Gustav, the developper of the game:


And here is the map of where you need to go, and in what order. Once again, this has been kindly provided by Gustav.


In the next section, I will provide detailed instruction for each step.

1. First of all, you need to reach the DLC area. Once you're there, get to the 2nd screen before the boss. Here you'll find the first character you need to talk too. You might find the platform to be too high. Fear not: to reach it, just use the ghost that appears where I'm standing to damage boost you up there. To do so, jump so it hits you when you're in the air. That should propel you to the platform. Once you're up there, talk to the character.


2. Then teleport to the clock tower checkpoint. Go outside of the clocker tower and jump on the platforms to go above the door. Talk to the character.


3. Now teleport to the ruined danche and go to the upper side. Talk to the character once again.


4. Teleport to the quarry and proceed to the right until you reach the next encounter.


5. Finally, teleport just before Lu'lein (I forgot the name of the warp point, sorry), go to the left and drop where the Skeleton Head boss was, then process to the right until you reach the last encounter. Talk to the character there and you should get the achievement!

Thanks again to Gustav for providing me all the steps necessary to get these achievements and the maps.