If you liked
Corpse Party: Tortured Souls - Bougyakusareta Tamashii no Jukyou
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...then you might like
Danganronpa: Kibou no Gakuen to Zetsubou no Koukousei The Animation
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Both include the characters being locked inside of a high school with no escape, and both include heaps of deaths throughout the whole thing. Corpse Party is far more bloody and gorey, but they're both pretty similar. Both have an evil mastermind that made it all happen in the first place.
If you liked
Mirai Nikki (TV)
|
...then you might like
Danganronpa: Kibou no Gakuen to Zetsubou no Koukousei The Animation
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Both of these Anime have the concept of 'kill or be killed' and the the last person standing wins. They both involve killing other characters whether they liked it or not. In Mirai Nikki each person had to keep their identity hidden in order to stay alive without the fear of death. In Danganronpa the person who committed a murder had to make sure no one found out it was them... also in order to stay alive. Both are pretty bloody, although the blood in Danganronpa is less realistic.