 Ominous Soul Core | Other | Soul Cores | 0 | 10 |
 Ominously Glowing Pill | Other | Quest Items | — | 0.05 |
 Omnious Cauldron | — | Teleporters | — | — |
 Omniphant Figurine | Decoration | Decorations | 0 | 6.5 |
 Omniscient Owl | Decoration | Fansite Items | 0 | 9.1 |
 Omnivora Soul Core | Other | Soul Cores | 0 | 10 |
 Omrabas' Bone Key | Other | Quest Items | 0 | 1 |
 Omrabas' Copper Key | Other | Quest Items | 0 | 1 |
 Omrabas' Heart | Other | Quest Items | 0 | 0.8 |
 Omrabas' Talking Skull | Other | Quest Items | 0 | 21.8 |
 One Hit Wonder | Weapons | Club Weapons | 0 | 96 |
 One of Timira's Many Heads | — | Creature Products | 215,000 | 31.5 |
 Onion | — | Food | 0 | 1.4 |
 Onyx Arrow | Weapons | Ammunition | 0 | 0.7 |
 Onyx Chip | Other | Valuables | 500 | 1.2 |
 Onyx Flail | Weapons | Club Weapons | 22,000 | 26 |
 Onyx Marble | — | Quest Items | 0 | 0.1 |
 Onyx Pendant | Equipment | Amulets and Necklaces | 3,500 | 8.5 |
 Oozing Carcass Soul Core | Other | Soul Cores | 0 | 10 |
 Oozing Corpus Soul Core | Other | Soul Cores | 0 | 10 |
 Opal | Other | Valuables | 500 | 1.2 |
 Open Metal Egg | Other | Quest Items | 0 | 0.3 |
 Opticompass Sphere | Other | Quest Items | 0 | 1 |
 Opticorder Rectifier (Activated) | — | Machines (Objects) | — | — |
 Opticording Sphere | Other | Quest Items | 0 | 2 |
 Opulent Book Case | Decoration | Containers | — | — |
 Opulent Carpet | Decoration | Floor Decorations | — | — |
 Opulent Chair | Decoration | Furniture | — | — |
 Opulent Chest | Decoration | Decorations | — | — |
 Opulent Floor Intarsia | Decoration | Floor Decorations | — | — |
 Opulent Floor Lamp (Lit) | — | — | — | — |
 Opulent Floor Lamp (Unlit) | — | — | — | — |
 Opulent Item Stand | Decoration | Decorations | — | — |
 Opulent Kline | Decoration | Furniture | — | — |
 Opulent Spice Rack | Decoration | Furniture | — | — |
 Opulent Table | Decoration | Tables | — | — |
 Opulent Wood Floor Planks | Decoration | Floor Decorations | — | — |
 Opulent Wooden Floor | Decoration | Floor Decorations | — | — |
 Oracle Figurine | Decoration | Decorations | 0 | 8 |
 Orange | — | Food | 0 | 1.1 |
 Orange 25 Years Balloon | Decoration | Decorations | 0 | 0.15 |
 Orange 25 Years Balloon (Inflated) | Decoration | Decorations | — | — |
 Orange Backpack | Decoration | Containers | 0 | 18 |
 Orange Bag | Decoration | Containers | 0 | 8 |
 Orange Balloon | Decoration | Decorations | 0 | 0.15 |
 Orange Balloon (Inflated) | Decoration | Decorations | — | — |
 Orange Cake Carpet | Decoration | Floor Decorations | — | — |
 Orange Fireworks | — | — | — | — |
 Orange Fireworks (Fountain) | — | — | — | — |
 Orange Fireworks Powder | Other | Party Items | 0 | 1 |