The Lurking Horror is an interactive fiction game released by Infocom in 1987. The game was written by Dave Lebling and inspired by the horror fiction writings of H. P. Lovecraft (including his Cthulhu Mythos). The original release was for MS-DOS, Apple II, Atari ST, Atari 8-bit computers, and Commodore 64. It was Infocom’s 26th game and the only in the horror genre. Infocom rated it as “Standard” in terms of difficulty. Later, it was ported to the Amiga with the addition of sound effects, making it the first Infocom adventure with that feature.