In Portable Ops, a young Roy Campbell appears as one of Naked Snake's comrades in the game. When the story begins, Naked Snake finds himself imprisoned by the FOX unit in South America with Campbell, a captured Green Beret whose unit was wiped out, in the cell next to him. The two escape and begins to recruit disfranchised enemy soldiers and other allies to their cause. In the original version of Portable Ops, Campbell is the only main character who cannot be added as a member of Snake's squad: instead he only communicates with the player via the radio and drives the truck which transports captured enemy soldiers. Campbell can only be added to the player's squad in the Portable Ops Plus expansion.
