Armstrong then requested that he lend them a hand so they could end war as a business. However, Armstrong stood up again virtually unharmed by Sam's assault.

After an intense battle, Sam seemingly was victorious over Armstrong. Armstrong, as his 'final interview', powered up to his maximum form, the spectacle of caused Sam to applauded the transformation. Sam then encountered Armstrong on the rooftop after defeating a Hammerhead. Sam then proceeded to locate several doors on the top floor, including the door leading to the rooftop of the HQ building. When Sam boarded an elevator to the roof he was contacted again by Armstrong, who noted how they both shared similar views, despite Sam's protests against the claim. Upon the defeat of the RAY unit, Armstrong then proceeded to invite Sam to the roof via the PA for a 'final test.' Sam then fought his way through the building until getting to the outside of a Japanese garden plaza, where Monsoon questioned his resolve, citing that he can't take out an organization as big as World Marshal all by himself, even if he 'removed the limbs,' although Sam retorted that he only fought for himself. After a debate regarding the consequences of Sam's actions, Monsoon dropped a RP grenade down to his level and then summoned a Metal Gear RAY UMG unit to attack him. Sam told Monsoon that he left Brazil since he had no need to stay anymore due to his exacting revenge (referring to his father's death at the hands of one of his pupils). He then encountered Monsoon, who questioned his motives regarding his slaughtering of a drug cartel. Sam, upon defeating the reinforcements, managed to reach his destination by jumping up on the crates and eventually entered a hangar area. Upon gaining entry, he then attempted to use the lifts, although his presence activated a lockdown on the lifts before he could reach his destination. Leaving the ruined mech behind, he then proceeded to enter the premises of World Marshal. The LQ-84i was then defeated by Sam, with him mentioning that he fought of his own choosing as why he prevailed over the mech. The LQ-84i briefly considered his advice, but was unable to disobey his directives due to Desperado blackmailing him with a memory wipe. Sam proceeded to tell him that he should think for himself. He later encountered the LQ-84i prototype unmanned gear who had orders to kill Sam, presumably from Armstrong. He proceeded to infiltrate the compound via the sewer systems of Denver, although not before killing two DPD cyborg police officers who caught him attempting to enter. Already a superlative sword, this led to the creation of an incredibly powerful HF Blade which glowed an eerie red color.ДЄt some point, Sam learned about Steven Armstrong's involvement with World Marshal, and decided to kill him for 'sacrificing soldiers from the comfort of an office.' Unbeknownst to him, however, Armstrong and Monsoon had arranged for his arrival at Denver to recruit him, in large part because of his taking out several drug cartels. At some point, he had the Murasama blade modified into an HF blade with an ID lock. He also made a name for himself in the criminal underworld, especially within South and Central America, with one story being that he managed to take down a hit squad composed of 10 mob enforcers with automatic weapons using only his sword during the early 2000s, a time before cyborg technology was available.

He then left Brazil, presumably to train, and eventually returned to kill the pupil in question before leaving Brazil permanently.ДЄfterwards, he travelled the world as a mercenary, and taking various odd jobs, including a job as a bodyguard and as a cleaner for the Mafia and the like. Sam's father was eventually killed by one of his pupils, with one of the drug cartels being rumored to have been involved for reasons and methods unknown, although not before Sam personally inherited his Murasama blade from his father. His father ran a Brazilian Kenjutsu dojo, and specifically taught the Uradachi technique, better known as Satsujin-ken or 'the murdering sword,' which dealt with violence as the end goal. Samuel Rodrigues was descended from a long line of swordsmen, dating back to 16th century Japan.

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