| Title | Publisher | Year | Language | Documents |
|---|---|---|---|---|
| I don't remember why this game is called "Onion" | Dan Shiovitz | 1999 | English | |
| I Must Play | Geoff Fortytwo | 2004 | English | Solution |
| I'm Gonna Take You To The Video Bar! | James Mitchelhill | 2004 | English | |
| In Darkness | GoblinBoy | 2009 | English | |
| In the Wilderness | Bits Bair | 2017 | English | |
| Indigo | Emily Short | 2011 | English | |
| Inheritance | Eric Toth | 1999 | English | Solution |
| Insanity Cubed | Simmon Keith Barney | 2000 | English | |
| Island of Infinity, The | Alex Freeman | 2003 | English | |
| Island, The | Andrew Brown | 2012 | English | |
| Isle of the Cult, The | Rune Berg | 2004 | English | Map |
| It | Emily Boegheim | 2011 | English | |
| It's a Match! | Mike Sousa | 2016 | English |