| Title |
Publisher |
Year |
Language |
Documents |
| Onyton Adventures, The |
Leversoft |
1987 |
English |
|
| Oo-topos |
Penguin Software , Sentient Software [1]  |
1981 |
English |
Solution |
| Ooze - Als die Geister Murbe Wurden |
Ariolasoft, Dragonware |
1988 |
German |
Solution |
| Ooze: Creepy Nites |
Dragonware |
1989 |
English |
Solution |
| Opal Lily, The |
McGraw-Hill Book Company UK |
1984 |
English |
Solution |
| Opening Night |
David Batterham |
2008 |
English |
|
| Operation Blue Sunrise |
Colin Campbell  |
1990 |
English |
|
| Operation Colossus |
Omega Software |
1985 |
English |
Solution, Map |
| Operation Extraction |
Ming-Yee Iu |
2011 |
English |
|
| Operation Kristos |
Computer and Video Games |
1986 |
English |
Solution |
| Operation Nightingale |
Softly Softly |
1985 |
English |
Solution, Map |
| Operation Safras |
Shards Software |
1983 |
English |
Solution |
| Operation Stallion |
Wrightchoice Software |
1987 |
English |
Solution |
| Operation: Ocean Master |
Falsoft Inc  |
1988 |
English |
|
| Operazione Ladro |
Arcadia S.r.l., Load 'n' Run  |
1986 |
Italian |
Map, Solution |
| Opium |
Ludia |
1985 |
French |
|
| Oppositely Opal |
Buster Hudson |
2015 |
English |
|
| Or des Azteques, L' |
? |
1994 |
French |
Map, Solution |
| Oracle, The |
Brandon Allen |
2002 |
English |
Solution |
| Orb of Light, The |
Wilson Software |
? |
English |
Solution |
| Orb Quest |
Guild Adventure Software, The , WoW Software  |
1991 |
English |
Solution, Map |
| Orb, The |
A&B Computing |
1986 |
English |
Solution |
| Order |
John Evans |
2004 |
English |
|
| Orevore Courier |
Brian Rapp |
2007 |
English |
|
| Orientation to Van Pelt Library |
Richard Young |
? |
English |
|
| Origin of Madame Time, The |
Brian Rushton  |
2018 |
English |
|
| Original Adventure, The |
Norell Data Systems , Software Toolworks |
1982 |
English |
Map, Solution |
| Origins |
Ade McT |
2016 |
English |
|
| Orion Agenda, The |
Ryan Weisenberger |
2004 |
English |
|
| Our Boys in Uniform |
Megan Stevens |
2013 |
English |
|
| Out |
Viktor Sobol |
2019 |
English |
|
| Out Of Line |
Cody Gaisser |
2022 |
English |
|
| Outcasts, The |
Dmitry Ivanushko |
2017 |
English |
|
| Outsided |
Chad Elliott |
1999 |
English |
Solution |
| Overlord |
Elise C. Boucher (Zosia the Pious)  |
1986 |
English |
Solution |
| Owl Consults, The |
Cidney Hamilton, Nick Mathewson, Thomas Mack |
2017 |
English |
|
| Oxbridge |
Tynesoft |
1986 |
English |
Hints, Solution |
| Oxygen |
Hansi Berlin |
2015 |
English |
|
| Oxygen |
Benjamin Sokal |
2010 |
English |
Solution |