Mister Bubbles is a promotional cosmetic item for the Engineer. It is a homemade, small, floppy doll with a spiral like torso, arms made of springs with hands made of spools, with one arm sporting a corkscrew, meant to resemble a drill, a large circular head with bottle caps attached to both sides of the head with six sown on yellow hexagon buttons in a circular formation, all meant to resemble a Big Daddy from the BioShock series.
- The Mister Bubbles was added to the game.
- [Undocumented] Removed the promotion restrictions from the Mister Bubbles.
- The item's name refers to a nickname given to Big Daddies by Little Sisters in the BioShock series.
- The item's appearance is based on a Bouncer, which is one of five Big Daddy models.
A Bouncer Big daddy doll made by a Little Sister as seen in Bioshock 2.