| Title | Author | KB | Genre |
|---|---|---|---|
| I Am a Living, Breathing, Walking, Talking Zebra Fart (v1.1) | WiL | 21.13 | Trippy |
| I Am Not A Hero | Zanno | 10.39 | 24HoZZT, Contest, Dungeon |
| I am saaaa [remake] | Viovis Acropolis | 16.31 | Remake, Trippy |
| IaDarb Technology Magazine #1 | IaDarb Inc. | 23.29 | Other |
| IaDarb Technology Magazine Issue #2 Preview Edition | Relm the IV | 18.23 | Other |
| iBag | WiL | 3.14 | Utility |
| Ibuki's Other 24 Hours of ZZT [Evil] | Various, wayward | 133.61 | 24HoZZT, Contest |
| Ice Station Zebra | Bark P, MAFU | 13.48 | Adventure |
| Ick | Scribbit | 24.37 | Minigame |
| ID4 | Jeff Quirk | 5.84 | Action |
| ID4: Independence Day | JWald90726 | 4.89 | Adventure, Fangame |
| Idiot Police Demo | Dr. Dos, SPAZM0016 | 15.21 | Adventure, Demo |
| An Idiot's Guide to Magic | EvilMario | 22.45 | Adventure, Demo, Puzzle |
| Idiotic Kung Fu RPG | Maullar Maullar | 40.59 | RPG |
| Idiotic Kung Fu RPG (Demo) | Maullar Maullar | 22.47 | Demo, RPG |
| IDKFA #1 ("ZZT Games") | THMiles | 15.16 | Magazine |
| IDKFA #2 ("Hardcore ZZT") | THMiles | 12.84 | Magazine |
| IF Mag Issue 1 | Hydra | 43.43 | Magazine |
| IF Mag Issue 2 | Hydra | 67.61 | Magazine |
| IF ZZT Logo Animation | Hercules, Venom | 1.46 | Engine |
| iFantasy 3 | Hydra | 32.92 | Magazine |
| iFantasy 4 | Hercules | 76.46 | Magazine |
| iFantasy 5 | Ethan Hunt | 44.77 | Magazine |
| iFantasy 6 | Flatcoat Lab | 41.81 | Magazine |
| iFantasy 7 | Anthony Testa, BlueMagus | 44.45 | Magazine |
| iFantasy 8 | Hydra | 57.03 | Magazine |
| iFantasy 9 | HM | 31.74 | Magazine |
| iFantasy 10 | Bob Pragt | 93.52 | Magazine |
| iFantasy 11 | fejjy | 60.81 | Magazine |
| Igl00 Magazine Issue 1 | Igl00 | 10.19 | Magazine |
| Ikari Warriors | SKC Soft | 11.86 | Action |
| Ikari Warriors II: Victory Road | SKC Soft | 11.7 | Action, Remake |
| Ikari Warriors III: The Rescue | SKC Soft | 20.1 | Action |
| Ikari Warriors Part One: Escape From The Jungle | Danny Knapp | 17.08 | Fangame, Shooter |
| An Ilford Conspiracy | Toby Norfolk-Thompson | 29.05 | Adventure |
| An Ilford Conspiracy (earlier build) | Toby Norfolk-Thompson | 28.7 | Adventure |
| The Immortals (Demo) | Griever | 17.71 | Cinema, Demo |
| Imp World 1 | Fx Fox | 9.06 | Adventure |
| Imperial Enslavement | DarkhawkK | 6.73 | Adventure, Fangame, Sci-Fi, Space |
| The Imperial Wars | J. Miller | 20.69 | Adventure, Parody, Shooter |
| Importance of Being a Junkyard Metalman Operator | Viovis Acropolis | 13.23 | Demo, Trippy |
| Important Life Lessons 1: Watch The Skies | Nuero | 12.07 | Cinema |
| Impossible Maze II | Flimsy Parkins | 13.12 | Maze |
| Improbus ZZT File Manager | Improbus | 31.57 | Utility |
| Improbus ZZT File Manager 2 | Improbus | 59.12 | Utility |
| In Dreams | Flatcoat Lab, Madeku | 33.84 | 24HoZZT, Adventure, Contest |
| In Search of the Unknown | Marcus D. Gregio | 15.61 | Action |
| Income and Stuff | Master Raze | 146.63 | Compilation, Puzzle |
| Income Demo | Master Raze | 16.25 | Comedy, Demo, Puzzle |
| Incomplete | Garvinash | 14.37 | Other |
| Incomplete Games | Various | 703.69 | Compilation, Incomplete |
| The Incredible Building | Hydra | 9.53 | Puzzle |
| Independence Day | TChiaramonte | 3.25 | Action, Fangame |
| Independence Day | Jeff Quirk, JWald90726 | 5.68 | Action, Fangame, Remake, Sci-Fi, Space |
| India! (Get the Bags, Boys!): Wicked Edition | breakout | 19.99 | Adventure |
| Indiana Jones and the Fate of Zebes | Simon Mime | 24.12 | Adventure |
| Indiana Jones and the Lost Crusaders | FunkMeister | 47.36 | Action, Adventure, Fangame |
| Indiana Jones ZZT | SNARFOOGLE | 17.59 | Adventure |
| Indiana Jones: The Search For King Solomon's Mines | Hydra | 55.7 | Adventure |
| Indigo Sprite's Inn-Turns 1-4 | LowerVP | 8.25 | Cinema, RPG |
| Indy Jones in The Lost Forest of The Ancients | Unknown | 15.57 | Adventure, Fangame |
| Indy's Climbing Expedition | ZZTechno | 13.72 | Adventure, Fangame, Incomplete |
| Inedible Vomit | Draco | 38.16 | Adventure |
| Infestation 1 | coolzx | 40.08 | Action |
| Infestation 2 | coolzx | 88.42 | Action |
| Infestation 3 v1.0 | coolzx | 59.76 | Action |
| Infestation 3 v2.0 | coolzx | 77.54 | Action |
| Infestation: Tower of Babel | coolzx | 23.48 | Action |
| Infestophobia v 1.3 | coolzx | 21.92 | Action |
| The Infuriatingly Vexatious Treasure of Uriah Madborogh | Zinfandel | 9.75 | Adventure, Contest, Oktrollberfest, Puzzle |
| Inhabitant | WiL | 14.08 | Experimental |
| Inn of the Cow | Jay Shapiro, Nancy Babyak | 29.7 | Action |
| Insane Inc. Magazine 2: Road To Insanity | Qwil Man | 23.5 | Magazine |
| Insane Inc. Magazine: SE | Insane Moose | 20.47 | Magazine |
| Insanity | AnthonyThW | 28.12 | Adventure, Fangame |
| Interactive Fantasies 3rd Birthday | Interactive Fantasies | 24.63 | Magazine |
| Interactive Fantasies 4th Birthday | Interactive Fantasies | 71.99 | Magazine |
| Interactive Fantasies 24 Artistic Hours of ZZT | Various | 316.15 | 24HoZZT, Art, Contest |
| Intergalactica - Demo | Nuero | 55.35 | Demo |
| International Jetpack Conference | myth, Rob Dubbin | 20.34 | Action, Adventure |
| Interstellar Police: Escape Stal' Prison | Bob Pragt | 40.55 | Adventure |
| Interstellar Police: Escape Stal' Prison (Original) | Bob Pragt | 36.74 | Adventure |
| Into the Forest I Go | Snorb | 273.46 | Experimental |
| Into the Maelstrom Part I: Dry Gulch | Whizzard | 11.58 | Adventure |
| Into the Maelstrom Part II: Hardpoint on Remulo III | Whizzard | 38.85 | Adventure |
| Into the Maelstrom: Dry Gulch Special Edition | _ry0suke_, Whizzard | 10.75 | Adventure |
| Into The Void: A | Insane Moose | 21.14 | Adventure |
| Into The Void: B | Insane Moose | 24.09 | Adventure |
| Into The Void: C | Insane Moose | 27.67 | Adventure |
| INTRO 2 AXE PEN | AXE PEN | 13.79 | Trippy |
| Invaders ZZT | Daniel James, Lynx | 7.51 | Action |
| The Invading Dicks Demo | Master Raze | 18.5 | Action, Comedy, Demo |
| Invasion | Unknown | 3.85 | Adventure |
| Invasion ZZT | JPI | 101.65 | Adventure, RPG |
| Invasion ZZT Revision | Princess Alena | 172.27 | Adventure |
| Iron Safari | gingermuffins | 16.83 | 24HoZZT, Contest |
| Island Adventure | Cam, Kevin Hall | 4.57 | Action |
| Island Adventure | Darren Hewer | 25.96 | Adventure |
| Island of Doom | Sam Hockaday | 13.18 | Adventure, Shareware |
| Island of Jerks 1 | Aric McKeown | 47.06 | Action, Adventure, Comedy |
| Island of Jerks 1: Special Edition | GameMstr1 | 67.3 | Action, Adventure, Comedy, Remake |
| Island of Jerks 1: Special Edition v1.5 | GameMstr1 | 156.09 | Action, Adventure, Comedy, Remake |
| Island of Jerks 2: I Might be Crazy | Aric McKeown | 22.11 | Action, Adventure, Comedy |
| Island of Jerks 2: I Might be Crazy (Preview) | Aric McKeown | 8.36 | Action, Adventure, Comedy, Demo |
| Island of Jerks 3: Not Again (A Musical) | Aric McKeown | 33.07 | Action, Adventure, Comedy |
| Island of Jerks 3: Not Again (A Musical) (Preview) | Aric McKeown | 20.89 | Action, Adventure, Comedy, Demo |
| Island of Jerks 4: I Love the Cow | Aric McKeown | 40.02 | Action, Adventure, Comedy |
| Island of Jerks 4: I Love the Cow (September 1994) | Aric McKeown | 25.6 | Action, Adventure, Comedy, Incomplete |
| Island of the Dragon Warriors | L4Suicide, Uncle Bubba, Wong Chung Bang | 68.87 | Action, Adventure |
| Island of ZZT | Ajc1490 | 14.24 | Adventure |
| The Isle of Death | Marcus D. Gregio | 8.8 | Action |
| IsPoint Magazine 1 | iskeith3 | 17.45 | Magazine |
| IsPoint Magazine 2 | iskeith3 | 9.77 | Magazine |
| IsPoint Magazine 4 | iskeith3 | 8.86 | Magazine |
| It | Degkdckan, LHS13 | 11.75 | Fangame, Horror |
| It's Not Mine! | wayward | 114.7 | Other |
| It's The End Of The World! | Creator | 27.36 | Action |
| itsmehere's blaster engine | itsmehere | 0.7 | Engine |