| Title |
Company |
Year |
Language |
Documents |
| Oasis of Shalimar |
Mountain Valley Software |
1982 |
English |
Solution |
| Oddessy |
Brendan Clarke |
? |
English |
Solution |
| Odinshrine |
Guild Adventure Software, The |
1988 |
English |
Solution |
| Odyssey |
XTC-Software |
? |
German |
Solution |
| Odyssey, The |
Duckworth Home Computing |
1986 |
English |
Solution |
| Og the Great |
Damian Steele |
? |
English |
Solution |
| Old Scores |
Global Software, (unpublished) |
1985 |
English |
|
| Ontsnapping, De |
Alex Dijkstra |
1996 |
Dutch |
Solution |
| Oo-topos |
Penguin Software  , Sentient Software [1] |
1981 |
English |
Solution |
| Opera House |
Bignose Software |
1984 |
English |
Solution, Hints |
| Operation Feuersturm |
Markt & Technik |
1988 |
German |
|
| Operation Hongkong |
Golden Games |
1986 |
German |
|
| Operation Neptun |
Markt & Technik, Happy Software |
1985 |
German |
|
| Oprør På Nyx |
Sepia Adventures |
1988 |
Danish |
|
| Orathan |
Paul Allen Panks |
2003 |
English |
|
| Orb of Light, The |
Wilson Software |
? |
English |
Solution |
| Orion Quest, The |
Argus Press Software, Mind Games |
1984 |
English |
|
| Overlord |
Guild Adventure Software, The |
? |
English |
Solution |
