Beat the game 2 and i mean u have to beat it on tank-plant and when u start over angain snake will wear glasses and then raiden will too!
beat the tanker on two game modes and ull unlock bandanna (infinate ammo)
beat the plant on 2 differnt modes and youll get the wig and stealth
get 50% with raiden on vr missions and ull get ninja raiden
get 100% with raiden and nija raiden and ull unlock ninja
get 50 % with snake and ull unlock pliskin
get 100% with pliskin and snake and ull unlock tuxcedo snake
get100% with everyone and ull get metal gear solid 1 snake ( the snake from the game in 1998)