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So this is a thread of your theories of how certain characters may fit into the SSE, now even if you watch spoilers on youtube and such it can still be hard do to the lack of voice, unless you count snakes 1 line right before you play as him. here are a few of mine then post yours
metaknight-I believe he fits in because of the halberd, it gets stollen from him and he is furious and wants it back.
snake- he is on a mission to find out what is going on and how he can stop it, sounds like an MGS title to me.