 Orca | 1 | 1/2,944 |
| Ore vein | 1 | 2/32,768 |
| Ornate lockbox | 1 | 1/50 |
 Otherworldly being | 1 | 1/2,730.67 |
 Paladin | 1 | 1/4,096 |
 Pee Hat | 1 | 1/1,638.4 |
 Penwie | 1 | 10/128 |
 Phantom Muspah (Ranged) | 1 | 1/19,251.2, 2 rolls |
| Pillory | 1 | 2/120 |
 Pirate (Brimhaven) | 1 | 1/8,192 |
 Pirate (1) | 1 | 1/8,192 |
| Prison Pete (Free-to-play) | 3 | 100/754 |
| Prison Pete (Members) | 3 | 631/5,656 |
 Professor Imblewyn | 1 | 10/128 |
 Professor Manglethorp | 1 | 10/128 |
 Professor Onglewip | 1 | 10/128 |
 Pygmy kraken | 1 | 1/6,912 |
 Pyrefiend (Level 43) | 1 | 1/2,730.67 |
 Pyrelord (1) | 1 | 1/2,730.67 |
 Red dragon (1) | 1 | 1/1,638.4 |
| Reinforced chest | 1 | 1/75 |
 Repugnant spectre | 1 | 1/256, 3 rolls |
| Reward Cart | 1–3 | Varies |
| Reward Chest (The Gauntlet) (Corrupted) | 5–15 | 1/24, 3 rolls |
| Reward Chest (The Gauntlet) (Regular) | 3–7 | 1/24, 2 rolls |
 Rick Turpentine (Normal) | 1 | 2/150 |
 Rock | 1 | 1/1,638.4 |
 Rock Crab (Active) | 1 | 1/8,192 |
| Rock Golem (monster) (High level) | 1 | 1/4,096 |
 Rock lobster (Active) | 1 | 1/8,192 |
| Rocks (The Tourist Trap) | 1 | 2/32,768 |
 Rockslug (Adult) | 1 | 1/1,365.33 |
| Rubium deposit | 1 | 2/32,768 |
| Rubium rocks | 1 | 2/32,768 |
 Rune dragon | 1 | 1/52,019.2 |
| Runite rocks | 1 | 2/32,768 |
| Rusty chest | 1 | 1/75 |
 Salarin the twisted | 1 | 1/8,192 |
 Sand Crab (Active) | 1 | 1/8,192 |
 Sarachnis | 20–30 | 1/100 |
| Sarachnis | 1 | 1/6,400 |
| Sarcophagus (Ancient Pyramid) | 1 | Rare |
 Scarab Mage (Level 66 (Contact!)) | 1 | 1/540.5 |
 Scorpia | 10–15 | 4/128 |
 Screaming banshee | 1 | 1/4,096, 3 rolls |
 Screaming twisted banshee | 1 | 1/4,096, 3 rolls |
 Sea Snake Hatchling | 1 | 1/8,192 |
 Sea Snake Young | 1 | 1/8,192 |