[Boomtown Scholar History Badge Plaque Missing]

It was moved slightly, you can find it on the wall near the tunnel.

 

[Echo: Atlas Park Badge Guide]

Head behind the big building in Ouroboros. You'll find another portal that'll get you to all the Echo zones.

[Echo: Atlas Park Badge Guide]

The Constant is an Accolade for collecting every exploration badge in both Atlas Park and Echo: Atlas Park.

 

Also, the Condemned badge eluded me for literally hours of searching over the weekend. I must have landed on every single surface in the zone except the one with the badge on it. Thank you!