Is Kings game a horror anime?

Is Kings game a horror anime? King’s Game was adapted as a live-action J-horror film in 2011 (trailer); it also spun off a manga. The anime reportedly combines material from the first two King’s Game “books.” The series opens with a class of 32 students receiving their first obey-or-die messages from King, and realising this guy is (deadly) real.

King’s Game was adapted as a live-action J-horror film in 2011 (trailer); it also spun off a manga. The anime reportedly combines material from the first two King’s Game “books.” The series opens with a class of 32 students receiving their first obey-or-die messages from King, and realising this guy is (deadly) real.
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