Hello Guardians! I'm seeing a lot of posts about the "Old Friends, Old Couch"-Triumph. If you start an activity in Destiny it'll keep track of all players that were part of this instance at any point. This means, if you start the DoE activity with 4 player in total, you CANNOT invite any other players, even if someone left. This Triumph has to be done with a maximum of 4 different guardians. Replacing any guardian who has left, will result in the triumph not unlocking, because the instance will count 5 different guardians who were in there at some point. Please keep this in mind and I hope you find this helpful or read this before posting about the triumph not unlocking for you.