| Title |
Publisher |
Year |
Language |
Documents |
| O Zone, The |
Compass Software  |
1986 |
English |
Solution, Hints |
| Octavo Pasajero, El |
Jarel  |
2001 |
Spanish |
|
| Odessy |
Brendan Clarke |
1986 |
English |
Solution |
| Odyssey |
Little Red Hen Software |
? |
English |
Solution, Map |
| Offensive Probing |
Benjamin Richard "Yahtzee" Croshaw  |
1999 |
English |
Solution |
| Omniverse |
Computerware |
1986 |
English |
Map |
| On Reflection |
Cheese Freak Software |
2007 |
English |
Solution |
| Oo-topos |
Penguin Software , Sentient Software [1]  |
1981 |
English |
Solution |
| Opaline |
Interactive Technology  |
1990 |
English |
|
| Operation Kristos |
Computer and Video Games |
1986 |
English |
Solution |
| Operation: Sabotage |
Guild Adventure Software, The , SoftSide Publications  |
1982 |
English |
Solution, Map, Fixed game |
| Opposite Edge of Slumber |
Artem Flo |
2020 |
English |
Solution, Map |
| Oprør På Nyx |
Sepia Adventures |
1988 |
Danish |
Solution |
| Orbit of Doom |
Central Solutions  |
1986 |
English |
Solution, Map |
| Origins |
Ade McT |
2016 |
English |
|
| Orion Agenda, The |
Ryan Weisenberger |
2004 |
English |
|
| Orion Quest, The |
Argus Press Software, Mind Games |
1984 |
English |
Solution, Map |
| Outcasts, The |
Dmitry Ivanushko |
2017 |
English |
|