Editing Colonel Roy Campbell

In the year 2005 during the events of ''Metal Gear Solid'', Campbell more or less coerced Snake into returning to the front lines when FOXHOUND, now led by Liquid Snake, took over [[Shadow Moses Island]] and its nuclear disposable facility and took several hostage, including Meryl as a form of blackmail. During the mission, Snake learned of that Campbell lied about the true motive of the mission and he was injected with the FOXDIE virus, which strained their relationship. Campbell also suspected he was being lied to about the true nature of the mission and concluded the Patriots were the true culprits. This suspicion was confirmed when the man who claimed to be Master Miller was revealed to be Liquid Snake the whole time. He also learned of an airstrike on the island and successfully called it off, but was subsequantly arrested by the secretary of defense for treason. While in prison, Campbell makes contact with the president, who is actually Solidus Snake, and informs him of the situation. The president pardons Campbell and arrests the secretary for stepping out of line. In case anyone involved is accused again, Campbell backs up all the data from the mission as proof of innocence. At some point after these events, Campbell reveals to Meryl that he is her real father, who now resents him for the burden he indirectly place on herself and her family her whole life.

By the year 2014, Campbell became a member of the United Nations oversight committee responsible for tracking PMC activities. During the events of ''Metal Gear Solid 4: Guns of the Patriots'', Campbell discovers the whereabouts of the previously missing Liquid Ocelot. However, the U.N. did nothing about this discovery. Dissatisfied with this lack of action, Campbell contacts Snake, who has aged rapidly due to his engineered genetics, and his partner Hal Emmerich (Otacon), to perform an assassination. During the mission, Snake again meets with Meryl, who has not spoken to her father in years and calls him a "womanizing piece of shit." This was spurred on by Campbell staging a marriage between himself and a woman named Rosemary to protect herself, Raiden, her former lover, and their son, John, who Raiden believes was a miscarriage at this point. Learning about Meryl's feelings visibly upset Campbell, but had to keep up the act to protect everyone. After the mission concluded, Campbell attempted to reconnect with Meryl, with him congratulating her on the upcoming marriage between herself and Johnny Sasaki. This attempt was initially met with heavy resistance to the point of Meryl unholstering her gun, which Campbell put against his throat as an ultimatum. Meryl did not go through and instead demanded Campbell walk her down the aisle to his amusement. He was last seen listening to Otacon and a young girl named Sunny, where he thanks Snake for all the work he has done.