Infinite Armor Points
The Characters that can do this are Hawke and Aveline and can be done at any point in the game. To do this, equip, un-equip, and then re-equip a shield. You can do it as many times as you want until you've maxed out.
Atlas is an action-rpg with rogue-like elements where you use your ability to control the ground to fight the enemies and move through procedurally generated worlds.
