That has became a sentient.
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Anything can happen now. They are just making it up as they go along until they think of a story. The original story where the traveller was actually the darkness would have been good. Even if a storyline worth following eventually appears in the game, it's been so long now that I don't think I care. I've been shooting aliens just because we are told to since the start. A story would just complicate things now lol.