| Nodon hunter [] | 1 | 90.7/1,000 |
| Ogre (Topless) [] | 1 | 325/1,000 |
| Ogress [] | 1 | 458/1,000 |
| Ogress champion [] | 1 | 539/1,000 |
| Ogress warrior [] | 1 | 389/1,000 |
| Ol' Sawtooth (Normal mode) [] | 1 | 93.7/1,000 |
| Olivia the Chronicler (Normal mode) [] | 1 | 93.7/1,000 |
| Onyx dragon [] | 1 | 89.6/1,000 |
| Onyx dragon (Dragonkin Laboratory) (Normal mode) [] | 1 | 93.7/1,000 |
| Oreb, the Magister (Normal mode) [] | 1 | 93.7/1,000 |
| Ork legion [] | 1 | 7/11 |
| Oyu the Quietest (Normal mode) [] | 1 | 93.7/1,000 |
| Pee Hat [] | 1 | 416/1,000 |
| Pig [] | 1 | 9.95/1,000 |
| Pirate plunder [{'content': 'Estimated rarity may be inaccurate due to a low sample size.', 'name': 'inaccurate'}] | 200 | 3/267 |
| Pirate plunder (small) [{'content': 'Estimated rarity may be inaccurate due to a low sample size.', 'name': 'inaccurate'}] | 200 | 3/267 |
| Possessed pickaxe (Lair of Tarn Razorlor) [] | 1 | 46.8/1,000 |
| Profane Scabarite [] | 2 | 5/100 |
| Pyrefiend [] | 1 | 46.3/1,000 |
| Pyrefiend [] | 1 | 46.3/1,000 |
| Quetzathog (Normal mode) [] | 1 | 93.7/1,000 |
| Ravenous ghoul [] | 1 | 698/1,000 |
| Red dragon [] | 1 | 181/1,000 |
| Red dragon (Dragonkin Laboratory) (Normal mode) [] | 1 | 93.7/1,000 |
| Reinforced chest (Dorgesh-Kaan) [] | 1–2 | Common |
| Renegade Menaphite soldier (Normal mode) [] | 1 | 93.7/1,000 |
| Ripper Demon [] | 4 | 110/1,000 |
| Ripper dinosaur [] | 1 | 93.7/1,000 |
| Rock [] | 1 | 416/1,000 |
| Rock crab [] | 1 | 290/1,000 |
| Rock lobster [] | 2 | 141/1,000 |
| Rogue [] | 1 | 25.2/1,000 |
| Rorarius [] | 1 | 462/1,000 |
| Rune dragon [] | 4 | 144/1,000 |
| Salawa akh [] | 1 | 89.6/1,000 |
| Sangri the Red (Normal mode) [] | 1 | 93.7/1,000 |
| Sanguine crawler [] | 1 | 216/1,000 |
| Sarkhan the Serpentspeaker (Normal mode) [] | 1 | 93.7/1,000 |
| Scarab akh [] | 1 | 89.6/1,000 |
| Scutarius [] | 1 | 190/1,000 |
| Sea crocodile (Normal mode) [] | 1 | 93.7/1,000 |
| Sea horror (Normal mode) [] | 1 | 93.7/1,000 |
| Secure chest (Dorgesh-Kaan) [] | 1 | Common |
| Secure chest (Oldak) [] | 1 | Common |
| Secure chest (Zanik) [] | 1 | Common |
| Seeker [] | 1 | 89.6/1,000 |
| Seiryu the Azure Serpent (Normal mode) [] | 1 | 93.7/1,000 |
| Shadow warrior [] | 1 | 106/1,000 |