The bomber who belongs to the Dead Cell unit in Metal Gear Solid 2: Sons of Liberty is Fatman. Raiden fights him on the Big Shell’s shell one facility during the early part of the main operation.
Fatman specializes in explosives and roller-skating movement. During the encounter, he plants bombs around the facility, forcing Raiden to locate and defuse them while surviving Fatman’s attacks. The battle emphasizes the environmental hazards and timed pressure that distinguish the Big Shell section.
Dead Cell is a former United States military anti-terrorist unit whose surviving members include Fortune and Vamp. Solidus Snake revives the group for the Big Shell takeover. Fatman’s name refers to his physical appearance and bomb-related identity, not to the historical atomic bomb nickname alone. The character is therefore separate from Vamp, the immortal-seeming knife fighter fought later.