This appearance has remained mostly consistent throughout subsequent installments, with minor changes due to Snake's advancing age.
Such design shows him as a brown-haired adult wearing a dark 'sneaking suit', as well as a bandanna.
During his debut appearances, Solid Snake's visual appearances were references to popular actors, and he was given his own consistent design in Metal Gear Solid. Solid Snake is a fictional character and one of the main protagonists of Konami's Metal Gear series created by Hideo Kojima.