Infocom, founded in 1979, is the shining light in the history of commercially-released InteractiveFiction games. Beginning with ''VideoGame/{{Zork}}'' in 1980, the company released over thirty games, many of which are still played.

The company's strengths included technical innovation (their TextParser was the best in the business, and the z-code data format Infocom created is a popular choice for distributing new IF games to this day), rich storytelling, and creative packaging (most Infocom games shipped with "{{feelies}}", thematically-related props which might form part of the CopyProtection system, constitute clues, give extra background information, or just be included for the lulz).

In 1986, struggling with competition from video games with fancy graphics and badly damaged by an ill-fated foray into the business software market, Infocom was bought by Activision. Shortly after the acquisition, Infocom's champion on the Activision board left the company, and his successor [[ExecutiveMeddling spent three years "improving" Infocom]] before pulling the plug in 1989.

These days many of their games are available on {{Abandonware}} sites - indeed the games (being entirely text) are ''incredibly'' small files by today's standards. ''VideoGame/TheHitchhikersGuideToTheGalaxy'', which was a very verbose game is only 128k - smaller than most modern digital pictures.

!! Infocom was the {{Trope Namer|s}} for:
* {{Feelies}}
* InteractiveFiction
!! Recurring tropes in Infocom games:

* ArcNumber: 69,105
* EasterEgg
* FeaturelessProtagonist
* {{Feelies}}
* FictionalDocument
* GuideDangIt: Many of the games were DEVILISHLY hard, but particularly: [[VideoGame/TheHitchhikersGuideToTheGalaxy Babel Fish]]
* InteractiveFiction
* InventoryManagementPuzzle
* KleptomaniacHero
* LockedDoor
* SecondPersonNarration
* UnwinnableByDesign
!!Infocom games with their own trope pages include:

* ''VideoGame/TheHitchhikersGuideToTheGalaxy''
* ''VideoGame/HollywoodHijinx''
* ''VideoGame/LeatherGoddessesOfPhobos''
* ''VideoGame/TheLurkingHorror''
* ''VideoGame/AMindForeverVoyaging''
* ''VideoGame/{{Planetfall}}'' (and ''Stationfall'')
* ''VideoGame/QuarterstaffTheTombOfSetmoth''
* ''VideoGame/{{Suspended}}''
* ''[[VideoGame/AstekaIITemploDelSol Tombs & Treasure]]''
* The ''VideoGame/{{Zork}}'' series
** The ''VideoGame/{{Enchanter}}'' trilogy
** ''VideoGame/{{Wishbringer}}''
** ''VideoGame/ZorkZero''
** ''VideoGame/ZorkQuestAssaultOnEgrethCastle''
** ''VideoGame/ZorkQuestTheCrystalOfDoom''
** ''VideoGame/ReturnToZork''
** ''VideoGame/ZorkNemesis''
** ''VideoGame/ZorkGrandInquisitor''

!!Tropes relating to individual games that don't have their own pages:

* BigDumbObject: Forms most of the plot of ''Starcross''
* CluelessDetective: In ''Ballyhoo''
* ControllableHelplessness
* CriminalMindGames: in ''Sherlock: The Riddle of the Crown Jewels''
* DevelopersForesight: Infocom's parsers were incredibly smart, probably due to having more memory to work with as the games didn't have any graphics.
* DiabolusExMachina: ''Infidel''
* FloatingInABubble: In ''Trinity''
* GoingByTheMatchbook: One of the {{Feelies}} in ''Witness''.
* HereWeGoAgain: ''Trinity''
* InCaseYouForgotWhoWroteIt: ''James Clavell's Shogun'', which James Clavell didn't have an active hand in adapting.
* LoserProtagonist: The backstory for ''Infidel'' establishes the player character as a greedy opportunist who is not half as clever as he/she thinks. Their situation at the beginning of the game is the direct result of some {{Jerkass}} behavior on their part and failure to see what was coming next.
* MasqueradeBall: The setting of ''Suspect''
* MultipleEndings: A very rare early example in ''Plundered Hearts''.
* ThePasswordIsAlwaysSwordfish: It is in ''Sherlock: The Riddle of the Crown Jewels'', anyway.
* PostModernism: In ''Deadline'', the player finds a novelization of the game within the game. In ''Trinity'', the player discovers a book that lists the last few commands he has typed in so far.
* PublicDomainCharacter: Each of the "Immortal Legends" games. ''Sherlock: The Riddle of the Crown Jewels'' features Franchise/SherlockHolmes and related characters; ''Arthur: The Quest for Excalibur'' does likewise for KingArthur.
* {{Ruritania}}: Frobnia in ''Border Zone''.
* StableTimeLoop: In ''Trinity''.
* SweetPollyOliver: In ''Plundered Hearts''.
* VillainProtagonist: ''Infidel''.