Glk/ZCode

ZCode
Engine developer	David Griffith, dreammaster
Companies that used it	Infocom and others
Games that use it	innumerable games
Date added to ScummVM	2018-12-09
First release containing it	None

About

The ScummVM Z-code engine is based on Frotz. Frotz is the most popular Z-machine implementation, developed by Stefan Jokisch to play games adhering to the different Z-machine versions of text-based games, first introduced for the Zork series and following games by Infocom, then later Graham Nelson's Inform that became the de facto standard for interactive fiction.

Games

Infocom games:

• Zork I: The Great Underground Empire (1980)
• Zork II: The Wizard of Frobozz (1981)
• Zork III: The Dungeon Master (1982)
• Deadline (1982)
• Starcross (1982)
• Suspended: A Cryogenic Nightmare (1983)
• The Witness (1983)
• Infidel (1983)
• Planetfall (1983)
• Enchanter (1983)
• Sorcerer (1984)
• Seastalker (1984)
• Cutthroats (1984)
• The Hitchhiker's Guide to the Galaxy (1984)
• Suspect (1984)
• A Mind Forever Voyaging (1985)
• Wishbringer: The Magick Stone of Dreams (1985)
• Spellbreaker (1985)
• Ballyhoo (1986)
• Hollywood Hijinx (1986)
• Leather Goddesses of Phobos (1986)
• Moonmist (1986)
• Trinity (1986)
• Border Zone (1987)
• Bureaucracy (1987)
• The Lurking Horror (1987)
• Nord and Bert Couldn't Make Head or Tail of It (1987)
• Plundered Hearts (1987)
• Stationfall (1987)
• Beyond Zork (1987)
• Zork Zero (1988)
• Sherlock: The Riddle of the Crown Jewels (1988)
• Arthur: The Quest for Excalibur (1989)
• James Clavell's Shōgun (1989)
• Journey: The Quest Begins (1989)
• Zork: The Undiscovered Underground (1997) (developed by Activision)
• Milliways (prototype) (created in 1988, released in 2008)

Converted from Alan2:

• Dinnertime (1999)
• Mazemapper (1999)
• The Mean Story (1999)
• To Get to the Other Side (1999)
• They're After You! (1999)

Converted from ScottFree - Adventure International games:

• Adventureland (1978)
• Pirate Adventure, a.k.a. Pirate Cove (1979)
• Mission: Impossible, a.k.a. Impossible Mission, a.k.a. Secret Mission (1979)
• Voodoo Castle (1979)
• The Count (1979)
• Strange Odyssey (1979)
• Mystery Fun House (1979)
• Pyramid of Doom (1979)
• Ghost Town (1980)
• Savage Island, Part I and II (1981)
• The Golden Voyage (1981)
• Sorcerer of Claymorgue Castle (1982)
• Return to Pirate's Isle (1983)
• The Adventures of Buckaroo Banzai Across the 8th Dimension (1984)
• Questprobe: Featuring the Hulk a.k.a Marvel Adventure #1 (1984)
• Questprobe: Featuring Spider-Man (1984)
• Questprobe: Featuring the Human Torch and the Thing (1985)

Converted from ScottFree - Mysterious Adventures series:

• Mysterious Adventures 1: The Golden Baton (1981)
• Mysterious Adventures 2: The Time Machine (1981)
• Mysterious Adventures 3: Arrow of Death Part 1 (1981)
• Mysterious Adventures 4: Arrow of Death Part 2 (1982)
• Mysterious Adventures 5: Escape from Pulsar 7 (1982)
• Mysterious Adventures 6: Circus (1982)
• Mysterious Adventures 7: Feasibility Experiment (1982)
• Mysterious Adventures 8: The Wizard of Akyrz (1983)
• Mysterious Adventures 9: Perseus and Andromeda (1983)
• Mysterious Adventures 10: Ten Little Indians (1983)
• Mysterious Adventures 11: Waxworks (1983)

Converted from Miscellaneous architectures:

• Super Star Trek (1971-1974) (converted from BASIC to C to Inform)
• Hunt the Wumpus (1973) (converted from BASIC to to Inform)
• Colossal Cave Adventure (I: 1975-1977, II: 1978-1981, 2.5: 1995, 3: 1978, 4: 1995, 5: 1978, 6: 1984, 370: 1993) (converted from Fortran/C to Inform)
• Robots (1976) (converted from BASIC to Inform)
• Zork (1978) (the original release by the team that would become Infocom at MIT, converted to Inform) (converted from Fortran to Inform)
• CIA Adventure (1980) (converted from BASIC to Inform)
• The Wizard's Castle (1980) (converted from BASIC to Inform)
• Frankenstein Adventure (1981) (converted from TRS-80 BASIC to Inform)
• Softporn Adventure (1981) (converted from BASIC to Inform)
• Inhumane (1985) (converted from Applesoft Basic to Inform)
• Praser 5 (1985) (converted from Applesoft Basic to Inform)
• Werner's Quest 1: The Black Ladder (1985) (converted from The Quill Adventure System to Inform)
• Werner's Quest 2: Revenge of the Thing-Fish (1985) (converted from The Quill Adventure System to Inform)
• Werner's Quest 3: Rance the Dungeonkeeper (1985) (converted from The Quill Adventure System to Inform)
• Werner's Quest 4: Unchanter (1985) (converted from The Quill Adventure System to Inform)
• The Nine Dancers (1986) (converted from BBC BASIC to Inform)
• Uninvited (1986) (converted from MacVenture to Inform)
• Paranoia (1987) (converted from C to Inform)
• The Puppet-Man (1987) (converted from BBC to Inform)
• Shadowgate (1987) (converted from MacVenture to Inform)
• Snafufun (1988) (converted from BASIC to Inform)
• Night of the Vampire Bunnies (1989) (converted from BASIC to Inform)
• Adventure in Humongous Cave (1993) (converted from AGT (Adventure Game Toolkit) to Inform)
• Odieus's Quest for the Magic Flingshot (1993) (converted from LADS (Levy's Adventure Development System) to AGT (Adventure Game Toolkit) to Inform)
• Freefall (1995) (Inform version of the 1984 game Tetris)
• Icebreaker (converted from 3DO to Inform)
• Robot Finds Kitten (1997) (converted from C to Inform)
• Reverzi (1999) (Inform version of the board game Reversi, also known as Othello)
• Chaos In Space (2001) (aka Warp!) (converted from DOS to Inform)
• HLA Adventure (2004) (converted from HLA (high level assembly) to Inform)
• Rachel Has a Bad Day (2007) (converted from ADRIFT to Inform)

Other:

• A Change in the Weather (1995)
• The Mind Electric (1995)
• CompXX (1996)
• Lists and Lists (1996)
• Phlegm (1996)
• So Far (1996)
• Apartment F209 (1997)
• Bedlam (1997)
• The Edifice (1997)
• I-0 (1997)
• Phred Phontious and the Quest for Pizza (1997)
• Sins Against Mimesis (1997)
• The Space Under the Window (1997)
• The Chicken Under the Window (1998)
• Flowers for Algernon (1998)
• Hey, I'm Supposed to be Free Range (1998)
• In the End II (1998)
• Photopia (1998)
• Saied (1998)
• Spacestation (1998)
• Spider And Web (1998)
• Three Steps to the Left (1998)
• Annoyotron (1999)
• Break-In (1999)
• Chicks Dig Jerks (1999)
• Coke Is It! (1999)
• Death to my Enemies (1999)
• Hunter, in Darkness (1999)
• The Mulldoon Legacy (1999)
• Revenger (1999)
• Varicella (1999)
• Zugzwang (1999)
• 9:05 (2000)
• Dragon! (2000)
• Fail-Safe (2000)
• Hallowe'en (2000)
• ManoZ (2000)
• My Angel (2000)
• Not Just A Game (2000)
• Shade (2000)
• Shrapnel (2000)
• Spitting Crumbs (2000)
• What-If? (2000)
• 1981 (2001)
• All Roads (2001)
• Discord (2001)
• Donkey Kong (2001)
• Finding Henry (2001)
• Fit for a Queen (2001)
• Hank Buzzcrack Has A Job To Do, God Damn It (2001)
• Heroes (2001)
• Jigsaw 2 (2001)
• Large Machine (2001)
• The Newcomer (2001)
• Pac-Man (2001)
• Peter Theta Fixes the Holodeck (2001)
• Pick Up the Phone Booth and Aisle (2001)
• The Sofa At The End Of The Universe (2001)
• A speedIF O entry (2001)
• Squeaky on the Moon (Fajfeta sur la Luno in Spanish) (2001)
• Stiffy Makane: The Undiscovered Country (2001)
• Tooth Ow Zunden Too (2001)
• Tooth Ow Zunden Won! (2001)
• A Walk Through Forever (2001)
• The Weapon (2001)
• Appallatron (2002)
• The Body (2002)
• Cheeseshop (2002)
• The Circus of Sadness (2002)
• Kraketoa Tuna Melt (2002)
• The Mulldoon Murders (2002)
• Soul-Searching (2002)
• The Angel Curse (2003)
• The Epitome of Toastlessness (2003)
• Insight (2003)
• Logic Puzzle Sampler (2003)
• The Thorn (2003)
• The Dreamhold (2004)
• Hotel Noir (2004)
• Last Ride of the Night (2004)
• Storforsen (2004)
• Turning Point (2004)
• Authority (2005)
• The Colour Pink (2005)
• The Corn Identity (2005)
• Dreary Lands (2005)
• The Fox, The Dragon, and The Stale Loaf of Bread (2005)
• Where There's A Will (2005)
• Another Goddamn Escape the Locked Room Game (2005)
• An Abbreviated Night Before Christmas (2006)
• Bob's Garage (2006)
• Chicken and Egg (2006)
• Delightful Wallpaper (2006)
• An Escape To Remember (2006)
• I'll (2006)
• Southern Gothic (2006)
• This is the game that I wrote (2006)
• The Tower of the Elephant (2006)
• AFGNCAAP - IF Agent! Todays Adventure: Holy Goat! (2007)
• Dead Cities (2007)
• House of Dream of Moon (2007)
• Jack in the box (2007)
• The Day I shot ... (2007)
• Trainstopping (2007)
• Xmaton (2007)
• Attack of the Terror Tabby!!! (2008)
• Bedtime story (2008)
• A Night With Kes (2008)
• Once upon a winter night, the ragman came singing under your window (2008)
• Pick up the pine box and die (2008)
• The Day I mauled ... (2008)
• Nine-tenths of the Law (2008)
• Violet (2008)
• What Happens in Vagueness (2008)
• 69,105 (2009)
• HTP (2009)
• IF Progressive One (2009)
• Intimate Encounters (2009)
• The Lighthouse (2009)
• Make It Good (2009)
• Paranoia (2009)
• Teaching her to dance (2009)
• Yay Games (2009)
• The Day I stabbed Stalin (2010)
• Dual Transform (2010)
• Explore! (2010)
• A Green Rain (2010)
• Hoist Sail for the Heliopause and Home (2010)
• Hoosegow (2010)
• Lobsters On A Plane (2010)
• Le Roi de Fihnargaia (2010)
• Mango (2010)
• Being the Ending of the Beginning (2011)
• Birth of Mind (2011)
• Bored Ladders (2011)
• Blue (2011)
• Cold Iron (2011)
• The Day I saved Elvis (2011)
• Delusions Again (2011)
• The extraordinary events of the last day of Professor Mangleworth (2011)
• Hangar 22 (2011)
• The man-eating, halitosic gorilla of Brazil (2011)
• Schießbefehl (2011)
• You've Got a Stew Going! (2011)
• And a Hippo New Year (2012)
• Color of Milk Coffee (2012)
• Dinner Bell (2012)
• Endless, Nameless (2012)
• Fingertips: All Alone (2012)
• Fingertips: Aren't You the Guy Who Hit Me in the Eye? (2012)
• Fingertips: Come On and Wreck My Car (2012)
• Fingertips: Everything Is Catching On Fire (2012)
• Fingertips: Fingertips (2012)
• Fingertips: Fingertips (Reprise) (2012)
• Fingertips: Hey Now, Everybody (2012)
• Fingertips: I Don't Understand You (2012)
• Fingertips: I Found a New Friend (2012)
• Fingertips: I Heard a Sound (2012)
• Fingertips: I Walk Along Darkened Corridors (2012)
• Fingertips: I'm Having a Heart Attack (2012)
• Fingertips: Leave Me Alone (2012)
• Fingertips: Please Pass the Milk Please (2012)
• Fingertips: Something Grabbed Ahold of My Hand (2012)
• Fingertips: The Day That Love Came To Play (2012)
• Fingertips: What's That Blue Thing Doing Here? (2012)
• Fingertips: Who's Knockin' on the Wall? (2012)
• Fingertips: Who's That Standing Out the Window (2012)
• IF Whispers 5 (2012)
• The Legend of the Missing Hat (2012)
• Nautilisia (2012)
• Parasites (2012)
• A Reading in May (2012)
• Dig My Grave (2012)
• The Statue Got Me High (2012)
• The Day I died (2013)
• The day I hugged Ghandi! (2013)
• Es kam aus den Alpen (2013)
• The Horrible Pyramid (2013)
• The Nessa Springs Slasher (2013)
• The Paper Bag Princess (2013)
• The tale of the cursed eagle (2013)
• Wrenlaw (2013)
• Craverly Heights (2014)
• The Day I came back (2014)
• Illuminate (2014)
• Kii!Wii! (2014)
• Monster Maker (2014)
• More (2014)
• The Mundane Tale of the Morning After (2014)
• So, You've Never Played a Text Adventure Before, Huh? (2014)
• Tea Ceremony (2014)
• By the Lake (2015)
• The Day of the Queen (2015)
• Discover the World (2015)
• Hippo on Elm Street (2015)
• The oldest hangover on Earth (2015)
• Ombre (2015)
• Someone Keeps Moving My Chair (2015)
• The Story of the Shinoboo (2015)
• The Day time stood still (2016)
• Life with OCD (2016)
• Baking With Lizzie (2017)
• Eggstraordinary Adventure (2017)
• The Bean Stalker (2018)
• Walk Among Us (2018)

Status

A work-in-progress sub-engine of the new Glk API has been added based on Frotz.

External links

• Other Frotz ports on the IF Archive
• Wikipedia article on the Z-machine
• IF Archive list of free Z-code games