Everyone is starting to know that there are 5 known chests, well here's the 6th that iv'e found. Up the stairs behind atheon all the way in the back right there is the 6th chest. how to unlock it? kill atheon with the final blow being a melee hit. my group i was with decided since we where all like level 29 '' let's finish off atheon with our melee'' the first time we ended up wiping because he 1 hit us all and we didn't get to do enough melee damage at the end to kill him, but we got it the 2nd time around and as i was heading out to orbit someone was like ''WTF there's a chest back here'' the only possible solution we thought of was...kill atheon with the final blow being melee damage.