Diabolical Fun is the fourth solo studio album by American rapper Illogic.

It was released in 2009.

The album was entirely produced by Ill Poetic.

Chet Betz of Cokemachineglow said: "Stellar closing track and a few highlights aside, Diabolical Fun sounds like an artist working just a little too far outside his comfort zone, trying to force his pentagonal peg into a round hole.

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