Plasmids are special serums made from processed ADAM that introduce modified stem cells into the body, allowing for genetic modification and mutation, giving the user what some might call "super powers". Unlike his later successors, Subject Delta is open to genetic alteration, allowing him the use of Plasmids. He is able to wield Plasmids and weapons simultaneously. Up to eight Plasmid slots are available, with three slots already available to the player from the start. Upgrading a Plasmid to the next level also unlocks an alternate method of use for that particular Plasmid. Plasmids available will each have a unique upgrade tree, and most can be upgraded twice. While several Plasmids can be found in the environment, most will have to be purchased from a Gatherer's Garden at a cost in ADAM. Plasmid bottles in BioShock 2 glow a bright red color.
Note: Upon obtaining this Plasmid, a Plasmid Slot will be opened up automatically at no cost to the player, granted the player has not purchased all slots prior. Obtaining this Plasmid after acquiring all other Plasmids will grant the player the "All Plasmids" achievement / trophy.