Skyrim
The Elder Scrolls series has numerous examples of cannibalism (the Bosmer, for instance, eat their dead and those they've defeated in battle) but Skyrim has at least one stand out example. In the mission The Taste Of Death, the player investigates the defiling of a Nord burial ground, where they find Eola, a priestess of Namira, the Lady of Decay. By completing her quest and feasting on Brother Verulus, the Ring of Namira is earned, granting +50 to life and stamina each time the Dragonborn eats a dead body.
Human Flesh is also an alchemic ingredient, meaning a lot of people had to die so you could have that unending supply of Paralysis potions.
