| Game |
Contribution |
| Nothing but Mazes | Image |
| Nutca | Image |
| Nutca | Image |
| Obscene Quest of Dr. Aardvarkbarf, The | Image |
| Obscure Naturalist, The | Image |
| Ocean Beach | Image |
| Oceana | Image |
| Ogre | Image |
| Oklib's Revenge | Image |
| Old Castle, The | Image |
| Old Father Time | Image |
| Old Jim's Convenience Store | Image |
| Old Lady | Image |
| Ollie Ollie Oxen Free | Image |
| OMNIQuest | Image |
| On Safari | Solution |
| On Safari | Map |
| On the Adventure Trail | Solution |
| On the Adventure Trail | Image |
| On the Way to the Interview | Solution |
| On the Way to the Interview | Image |
| One Night Stand | Image |
| One Smurfy Day | Image |
| One That Got Away, The | Image |
| One Way Out | Image |
| One Week | Image |
| Onyton Adventures, The | Image |
| Onyton Adventures, The | Image |
| Oo-topos | Image |
| Ooze: Creepy Nites | Image |
| Opal Lily, The | Image |
| Operation Blue Sunrise | Image |
| Operation Extraction | Image |
| Operation Kristos | Image |
| Operation Kristos | Solution |
| Operation Safras | Solution |
| Operation Safras | Image |
| Operation: Sabotage | Image |
| Operazione Ladro | Image |
| Opium | Image |
| Orb, The | Image |
| Orb, The | Solution |
| Orientation to Van Pelt Library | Image |
| Origin of Madame Time, The | Image |
| Out | Image |
| Owl Consults, The | Image |
| Oxbridge | Image |
| PAC-TXT | Image |
| Palace Adventure | Image |
| Palace in Thunderland | Image |
