The Atmos Protector is a Hardmode accessory that rarely drops from Martian Scouts. When equipped, it reduces damage taken by 4% and has a 1.67% (1:60) chance to nullify hostile projectiles before they hit the player.
- While the chance to nullify hostile projectiles is low, this chance applies each game tick and to any hostile projectile that intersects the player's hitbox. This means that projectiles could be nullified during invincibility frames before hitting the player.
- The name may be a reference to a part of space suits known as the atmosphere protector.
