| Title | Publisher | Year | Language | Documents |
|---|---|---|---|---|
| Ice World War | Kit Domenico | 1981 | English | Solution, Map |
| In Search of Trash Island | Roger M. Wilcox |
1981 | English | Solution, Map |
| In the Universe Beyond | Roger M. Wilcox |
1981 | English | Solution, Map |
| Inca Curse | Artic Computing, Paxman Promotions, Real Software | 1981 | English | Solution, Map, Hints |
| Inferno | Software Emporium, The | 1981 | English | |
| Institute, The | Med Systems |
1981 | English | Solution, Map |
| Intercept | Michael D. Wile | 1981 | English | Solution |
| Intergalactic | Acornsoft |
1981 | English | |
| Interstellar War | Roger M. Wilcox |
1981 | English | Solution, Map |
| Island Adventure | CLOAD |
1981 | English | Solution, Map |
| It Takes a Thief | Randy Dobkin | 1981 | English |