John Petrucci, guitarist for Dream Theater, contributed music to the game's score by composing the prologue and epilogue FMV music.
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(While the story takes minor elements from "The Whisperer in Darkness", the bat-like aliens have little in common with the Mi-go. The only real similarity seems to be in their ability to transfer a human brain into a new container, albeit one of their own bodies rather than a canister, as a means to expand their population. They also bear no physical resemblance aside from wings.)