THAT IS ALL ZELL IS TRYING TO DO. HE JUST WANTS TO MAKE FRIENDS WITH THE SOLDIERS. He's just... very enthusiastic about it.
Metal Gear Solid 3 actually gives you a tranq gun and the option to get through almost the entire game without killing anyone (except the bosses). There's a fantastic bit where (spoilers ahead, though I feel like if you were going to play the game, you'd have done it by now) Snake, after falling off a bridge, hallucinates a long walk down a burning river, haunted by the ghosts of every single person he's killed over the course of the game. Depending on how you've played the game to that point, it can be either a very short or a very, very long sequence.
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Metal Gear Solid 3 actually gives you a tranq gun and the option to get through almost the entire game without killing anyone (except the bosses). There's a fantastic bit where (spoilers ahead, though I feel like if you were going to play the game, you'd have done it by now) Snake, after falling off a bridge, hallucinates a long walk down a burning river, haunted by the ghosts of every single person he's killed over the course of the game. Depending on how you've played the game to that point, it can be either a very short or a very, very long sequence.