Snake is an experienced mercenary and one of the three products of the Les Enfants Terribles project, a project that created clones of the legendary soldier Big Boss. He is known as a war hero and performing impossible tasks; some people consider him a bit of a legendary figure. Clash represents one of Snake's final missions, being in somewhat of an alternate continuity to the fourth game in the Solid series in the series regarding how he ends up in the Dark Tournament and what becomes of him.
Snake is one of the more physically changed characters from Brawl, now sporting his Old Snake look from the fourth Metal Gear Solid title. His moveset is identical to how it was in the previous game however.