Sean has a device attached to the back of his armor, called A.I.D. (Automated Injection Dispenser), which allows various healing and damage reduction abilities. Once it runs out of charges, it is disposed of, and Sean has to find another one. This is similar in action to how armor acts in other shooters.
A.I.D. Charge Edit
One-shot charge device. Adds one point to A.I.D. resources, can go beyond 100.
Basic A.I.D. Backpack Edit
Standard issue green backpack with a damage reduction capacity of 1/3 and a charge of 100 units.
Advanced A.I.D. Backpack Edit
Enhanced blue backpack with a damage reduction capacity of 1/2 and a charge of 200 units.