| Title | Publisher | Year | Language | Documents |
|---|---|---|---|---|
| Ice House of Horrors | Sean M. Shore | 2013 | English | Solution, Map |
| Impulso | Expio | 2005 | English | |
| Inmortales, Los | Carlos Gomez |
2002 | Spanish | |
| Inner Demons | Michael Zerbo |
1994 | English | Solution, Hints |
| Invasion of the Angora-fetish Transvestites From the Graveyards of Jupiter | Morten Rasmussen | 2001 | English | Solution |
| Invitation | Loriciels | 1987 | French | |
| Island, The | Andrew Brown | 2012 | English | |
| Italianate | Andy McDermott |
2022 | English |