In NetHack you can sacrifice sufficiently fresh corpses at altars for various benefits. Are there any earlier games where such sacrifices are a general game mechanic? Going by the TV Tropes page on Offerings to the Gods NetHack, circa 1987, seems to be the earliest.
There's only so many games before then. Pre-1980 has about 50, and TVTropes knows about 500 between 1980 and 1987.
(By "general game mechanic" I mean "excluding altar sacrifices which are done only to solve a puzzle and/or advance the plot".)