Aeon's End: The Outcasts continues the Expedition system introduced in Aeon's End: New Era, which allows players to replay all the content they own in the form of a short campaign. After each game, players will receive new treasures and player cards that will allow them to become more powerful. However, the enemies that players will face become stronger and stronger with each battle.

The Outcasts is a new box that can be played independently but whose content can also be added to all other boxes in Aeon's End.