Most Popular "adult-animation", Animation Feature Films. Sausage Party () R | 89 min | Animation, Adventure, Comedy. Kötü Kedi Serafettin () 86 min | Animation, Action, Adventure. Beowulf () PG | min | Animation, Action, Adventure. Princess Mononoke () Akira () Ghost in the Shell () The. Feb 6, - Keep the kids away from this adult animation. Sabbath and Blue Oyster Cult—Heavy Metal is an early '80s adolescent boy's fever dream.