 If you liked
Devil Survivor 2 The Animation
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 ...then you might like
Aoki Hagane no Arpeggio: Ars Nova
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Apocalyptic series with a 'selected' protagonist (and his friends) who aim to restore balance to the world. The enemy they deal with are intelligent non-human entities. Both strike me as series you should watch if you have watched the other, they have their own style of execution but share a similar atmosphere and narrative. Ars Nova is more fleshed out in terms of strategy though.