Creator/{{Infocom}}'s 1987 entry into the horror genre opens in the computer lab at G.U.E. Tech. You've braved a snowstorm to finish an important assignment, but find your work interrupted by strange nightmares. When your paper vanishes from the server you find yourself exploring the campus for answers.

''The Lurking Horror'' is one of Infocom's easier [[InteractiveFiction text adventures]], but has some very creative puzzles and great writing and atmosphere.

!!This game contains examples of:
* BlobMonster
* ClosedCircle: You're forced to spend the night in the computer lab by a blizzard.
* CopyProtection: Your user name and password.
* {{Expy}}: G.U.E. Tech for the Massachusetts Institute of Technology.
* {{Feelies}}: Your student ID card and a little rubber centipede.
* HaveANiceDeath: {{Averted|Trope}}, surprisingly for the usually [[WorldOfSnark snarky]] Infocom.
* HoistByHisOwnPetard: [[spoiler:The Professor is attempting to summon a dark creature for use in [[HumanSacrifice your being sacrificed for some]] "Elixir of Life"; but if you play the cards right and exit the pentagram, then he'll end up getting sacrificed by the very dark creature he has summoned.]]
* LovecraftLite: The monsters are terrifying, but for all the Lovecraftian trappings it's more general horror than a CosmicHorrorStory.
* MadScientist: [[spoiler: If you consider alchemy a science.]]
* MoonLogicPuzzle: The maze at the bottom of the tunnels.
* MustHaveCaffeine: Of the soda type: you get a two-liter bottle of Coke from the fridge and save it for when you're becoming very tired and about to fall asleep on the job.
* MundaneUtility: The disembodied hand. And how.
* NightmareSequence / OrWasItADream
* NoNameGiven: None of the characters have names, not even the FeaturelessProtagonist.
* ShownTheirWork: The G.U.E. tech is based on the M.I.T. Institute (the place where Dave Lebling and his team were working from the 1970s to the 1980s) and its real-life experiences and rooms inside and outside. More info can be found [[http://www.filfre.net/2015/10/mit-and-gue-or-the-annotated-lurking-horror/ here]].
* SummoningRitual
* ThingsThatGoBumpInTheNight: The final monster you face is described in these terms.
* TimeMarchesOn: Much of the premise relies on 1980s computer networking technology, enough so that at times the game feels like a PeriodPiece.
* UnwinnableByDesign: Generally falls under Tough on Zarf's scale.
* YouCantGetYeFlask: There are quite a few examples in the game, like when you want to heat up the Chinese food for the hacker to eat ("set microwave to 5 minutes", "set timer to 5 minutes", "set microwave to 60 seconds", "turn on microwave", "program microwave", etc. don't work; the solution would be to "press 5", "press 0" x2, "press hi", and finally "press start"); or when you want to put the ladder down from the top of the dome (not "drop ladder to floor below", not "put ladder on floor", etc., but "lower the ladder").