| Title | Publisher | Year | Language | Documents |
|---|---|---|---|---|
| Igor's Quest | ? | 2020 | English | Solution, Map |
| In a Tomb with a Donkey | Dee Cooke |
2023 | English | |
| International Cryptex Day | Errol Elumir | 2021 | English | |
| Into the Dungeon | Millenium Games | 2018 | English | |
| Into the Dungeon 2 | Millenium Games | 2018 | English | |
| Isla del Diablo, La | Farland Adventures | 2024 | Spanish |