 If you liked
Fate/Zero
|
 ...then you might like
No Game No Life: Zero
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Pretty dark and epic, a “Zero” story that serves as the prequel but needs to be watched after finishing the main series for the best experience. Riku and Kiritsugu, the main protagonists from the two stories, are brooding, edgy, and obsessed with the idea of utilitarianism, willing to sacrifice the minority for the sake of the majority and would do anything in order to achieve their goal.