Hidden Echo Location in Chelsea in The Division (Final Collectible in Chelsea) The Final Curtain Achievement Trophy Guidebr br To unlock the last Collectible (Echo) in Chelsea, you will have to complete all story mission. This will unlock a new mission in Chelsea in which you can collect the "hidden" Echo. br br This will unlock the following Achievement Trophybr br THE FINAL CURTAINbr Uncover the fates of Gordon Amherst and Aaron Keener.br br FOLLOW US ON SOCIAL MEDIA :)br br ★Check out the website: www.randomchievos.combr br ★Watch us Live stream: www.twitch.