Lost Relics are collectibles found around the Campaign Field map. Once you stand near to them, an icon will appear, signifying that you have found a collectible and in range to collect it.
You will find Blueprints for Outpost buildings to advance your Academy, and more rewards. You can also get rewards for collecting a complete set – Memoirs, Call Logs, and Data in the Command Center. Here you will find our guides to finding all the Lost Relics for each chapter.
Note: Make sure to scroll down for correct blueprint locations in the early chapters, as they've been assigned new spots in a old update!