| Title | Publisher | Year | Language | Documents |
|---|---|---|---|---|
| I.T. - Das Abenteuer des Jahrhunderts | Birkhäuser Verlag | 1984 | German | Solution, Map |
| I.T. - de Adventure van de Eeuw | Omikron | 1983 | Dutch | Solution, Map |
| I.T. - The Adventure of the Century | Addison-Wesley Publishers |
1983 | English | Solution, Map |
| Innuh's Pyramid | ? | 2018 | English | Solution, Map |
| Input Adventure | Input Magazine | 1984 | English | Solution, Map, Hints |
| Isla de los Secretos, La | Anaya | 1984 | Spanish | |
| Island of Secrets | Usborne Publishing | 1984 | English | Solution |