 If you liked
Shinseiki Evangelion Movie: Air/Magokoro wo, Kimi ni
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 ...then you might like
Mnemosyne: Mnemosyne no Musume-tachi
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Both have some dark, gorey action sequences and periods of more abstract body horror, nudity, and pseudo-religious themes dealing with "the fate of humanity." Heavy on the taboo, they tell the story of characters trying to find a reason to live, and the struggle to motivate themselves to that end. I especially feel the ending arcs are quite similar.