Can verify what ninja sloth mentioned. After trying for the achievement about five times (avoiding the trap using both teleports and by walking through the traps normally, avoiding the platforms with the Controllers on them, etc.), I followed his steps and was awarded with the chest:
- Completed mission normally (i.e. walked around traps, avoided Controller pads, etc.).
- Back-tracked and triggered both sets of traps.
- Note: Achievement buff was removed from bar at this point.
- Killed remaining wolves on the level.
- Proceeded into the map room.
- Achievement triggered and I was awarded with the achievement and chest.
I’m unsure whether you can get it by simply progressing through the traps or need to actually backtrack through the traps after you’ve completed the mission (ninja sloth seems to suggest you can just gun-ho your way through and get it), but there’s definitely a bug in how the achievement is tracked (though the buff on the bar is tracked properly).
Good luck, everyone.