The Original vs. Twin Snakes
Original
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Superior voice actin'
Memorable score
Probably the best graphics ever made for a PS1
Twin Snakes
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First Person View Shootin' (But takes the challenge out the Ocelot fight)
A few more weapons
Boss Survival
One guard catchin' you doesn't automatically get all guards on you
Shootin' legs and arms have a real effect on guards
Faster way to do the card thing (Spoiler)
Obviously better graphics
More cutscenes
The original Metal Gear Solid was better than this one still
They call me the Iceman, because I'm fresh to death
With diamonds around my wrist and on my neck