 Norcferatu Fortress | Yalahar | — | Dworc ShadowstalkerGloom MawNorcferatu Heartless+3 |
 Northern Zao Plantations | Farmine | 90–110 | Insect SwarmToadLancer Beetle+12 |
 Nykri Delta | Issavi | 250–300 | SheepSeagullFlamingo+7 |
 Oasis Tomb | Ankrahmun | 10–13 | SnakeHyaenaPoison Spider+22 |
 Okolnir | Svargrond | 80–110 | PenguinFrost Dragon HatchlingFrost Dragon |
 Old Fortress | Edron | 60 | WyvernBonebeastNecromancer+7 |
 Old Masonry | Ab'Dendriel | 120 | NecromancerLichUndead Gladiator+7 |
 Oramond Dungeon | Rathleton | 140–160 | Glooth GolemRustheap GolemWorker Golem+11 |
 Oramond Fury Dungeon | Rathleton | — | SpectreNightmareFury+10 |
 Oramond Hydra Bog Raider Cave | Rathleton | 100–120 | HydraBog Raider |
 Oramond Marshes | Rathleton | 70–120 | Blood BeastMooh'Tah WarriorMinotaur Hunter+1 |
 Oramond Minotaur Camp | Rathleton | 70–120 | Mooh'Tah WarriorMinotaur HunterWorm Priestess+3 |
 Oramond Western Plains | Rathleton | 200 | Glooth BlobRot ElementalBlood Beast+5 |
 Orc Peninsula | Thais | 25–30 | OrcOrc SpearmanOrc Warrior+3 |
 Oskayaat Undercity | Ankrahmun | 200 | WeretigerCunning WerepantherWhite Weretiger |
 Otherworld | Svargrond | 200 | SparkionBreach BroodReality Reaver+25 |
 Otherworld (Dwarf Bridge) | Thais | 90–100 | BursterInstable Breach BroodInstable Sparkion |
 Otherworld (Edron) | Edron | 120–150 | Dreadful DisruptorStabilizing Reality ReaverStabilizing Dread Intruder |
 Outlaw Camp | Kazordoon | 20 | RabbitDeerSnake+30 |
 Outlaw Camp Water Elemental Cave | Kazordoon | 55–70 | Water Elemental |
| Peninsula Tomb | Ankrahmun | 13–20 | SnakeSpiderPoison Spider+24 |
| Percht Island | Gray Beach | 80 | Bonny BunnyBaleful BunnySchiach+1 |
 Pirat Mine | Issavi | 100 | Pirat CutthroatPirat ScoundrelPirat Bombardier |
 Pits of Inferno | Venore | 130–160 | Demon (Goblin)Demon SkeletonDragon+30 |
 Pits of Inferno Dragon Lair | Venore | 80–100 | Dragon HatchlingDragonDragon Lord |
| Pits of Inferno Levers | Venore | — | — |
| Pits of Inferno Spa | Venore | — | — |
 Plains of Havoc | Venore | 19–25 | RatWolfPoison Spider+28 |
 Plains of Havoc Dragon Lair | Venore | 65–80 | Fire DevilDragonDragon Lord+1 |
 Poacher Caves | Venore | — | WolfWar WolfBear+2 |
 Poacher Caves Gloomy | Venore | — | Ghost WolfGloom WolfWyvern |
 Poacher Caves Poachers | Venore | 20 | PoacherHunterWolf+1 |
 Podzilla | Oramond | 600 | Grove GuardianHerd WeevilCommon Beetle+7 |
 Port Hope Swamp Trolls | Port Hope | 8 | Cave RatBugSpider+5 |
 Putrefactory | Northern Darama | — | Oozing CarcassSopping CarcassRotten Man-Maggot+1 |
 Quara Grotto | Liberty Bay | 40–45 | CrabQuara Mantassin ScoutQuara Constrictor Scout+8 |
 Radiant Ascendancy | Marapur | — | Radiant TemplarRadiant InquisitorRadiant Zealot+3 |
 Radiant Skyhold | Marapur | — | Radiant WardenRadiant ParagonRadiant Acolyte+3 |
 Ragnir | Svargrond | 40–50 | Winter WolfBarbarian SkullhunterBarbarian Headsplitter+3 |
 Ramoa | Liberty Bay | 60–70 | CobraScorpionGhost+10 |
| Rathleton Ancient Sewers | Rathleton | — | Glooth BlobRot ElementalGlooth Anemone+2 |
 Rathleton New Sewers | Rathleton | — | DevourerGlooth AnemoneGlooth Golem+3 |
 Razachai | Farmine | 120–130 | Lizard LegionnaireLizard Dragon PriestLizard High Guard+33 |
 Replica Dungeon | Port Hope | 110 | Iron Servant ReplicaGolden Servant ReplicaDiamond Servant Replica |
 Robson's Isle | Kazordoon | 60–80 | TarantulaMutated HumanMutated Rat+7 |
 Rookgaard Bear Cave | Rookgaard | 5 | Bear |
 Rookgaard Orc Fortress | Rookgaard | 7 | DeerSnakeWasp+3 |
| Rorc Plains | Kazordoon | 45–55 | DeerWaspRorc |
 Roshamuul Cistern | Roshamuul | — | TerrorsleepFeversleepShiversleep |
| Roshamuul Mines | Roshamuul | — | — |