i just figured this out so please listen Legacy of rust ep 2 level 6 go to the far left of the map where you find the acid pits and find a pit full of imps save first if your using cheats probably the only way to get this WARNING: When using IDKFA it does give you all weapons for Legacy of rust but it also give you a duplicate of the 2 new weapons if your using controller go from the fist the the left 2x to use the real Calamity blade or the Tracker will not work took me and my friends a few tries to get the achievement but we did get it