Did Liquid Control Ocelot?
Decades later, Big Boss would later reveal to Solid Snake that Revolver Ocelot utilized hypnotherapy in the 2000s to transplant the then-deceased Liquid Snake's personality into himself, forming Liquid Ocelot. He did this in order to confuse the Patriots during his attempt to bring them down.
the new FOXDIE virus
Though Liquid Ocelot seemingly died from exhaustion, Big Boss explained that he had actually been killed by the new FOXDIE virus with which Snake had been infected by the Patriots via Drebin 893.
Immediately afterwards, Ocelot's life was subsequently claimed by the new FOXDIE virus, designed by the Patriots to kill him along with EVA and Big Boss.
He knew before, but self-hypnosis made him forget. Originally posted by Panda: Originally posted by Sonny Mastrangioli: Ocelot knew from the start because of the Hypnosis Therapy performed on you/Venom/Combat Doctor from GZ and himself to make you/himself THINK he's BB.
At the end of the game, when Ocelot asks what N. Snake's name is, Snake smiles and responds with 'John'. He smiles because he knows that he is basically one-upping Ocelot, because it is not his real name. He calls himself John to hide his real identity.