A Splicer is simply a Rapture citizen who has repeatedly "spliced" themselves with Adam. While the substance may provide a host of physical enhancements, it also takes a toll on the mind. Leadhead Splicers are crazed humans armed with a Pistol or Machine Gun that they will fire at anything that crosses their path - including you.

There are five research levels that can be attained by snapping photos of Leadhead Splicers:

• Research Level 1: Increased Damage (+)
• Research Level 2: Scrounger
• Research Level 3: Increased Damage (++)
• Research Level 4: Static Discharge 2
• Research Level 5: Increased Damage (+++)