Splicer

Splicers are the main enemies within the BioShock and BioShock 2 series. The remains of Rapture's human population, they are the result of the violent conflict during the Rapture Civil War. they appear in Playstation All-Stars Battle Royale on the Rapture level.

Biography
During this war and the chaotic days that followed, the Splicers apparently murdered most of the sane population of the city. Due to abusive ADAM consumption, their bodies and minds have been deformed beyond repair (though some of their physical deformities can be attributed to Dr. J.S. Steinman's plastic surgery), and they have become dependent on the substance, both mentally and physically. Many of them still wear Masquerade Ball masks, perhaps, as Atlas suggested, out of shame at how ADAM has deformed their bodies.

Connection with All-Stars
When Big Daddy uses his Level 3 Super, Flood, the stage will be filled with water and several Splicers can be seen swimming around in the background. However they only appear before the Flow organisms appeared.