| Creature | Terrain | Climate | Campaign | Reference |
|---|---|---|---|---|
| Ape, Minimal | Jungle | Tropical | Any | OMII 85 |
| Baboon, Minimal | Jungle | Tropical | Any | OMII 85 |
| Badger, Minimal | Any | Temperate | Any | OMII 85 |
| Barghest | Any | Any | Any | OMII 13 |
| Basidirond | Any | Any | Any | OMII 15 |
| Bat, Fire | Subterranean | Tropical | Any | OMII 16 |
| Bear, Black, Minimal | Land | Temperate | Any | OMII 85 |
| Bear, Brown, Minimal | Land | Temperate | Any | OMII 85 |
| Bear, Cave, Minimal | Land | Any | Any | OMII 85 |
| Boar, Wild, Minimal | Any | Temp/Trop | Any | OMII 85 |
| Bowler | Subterranean | Any | Any | OMII 21 |
| Buffalo, Minimal | Plains | Temp/Trop | Any | OMII 85 |
| Bull, Minimal | Any | Any | Any | OMII 85 |
| Burr, Bark- | Forests | Any | Any | OMII 14 |
| Burr, Dire- | Forests | Any | Any | OMII 14 |
| Camel, Minimal | Land | Any | Any | OMII 85 |
| Cave Moray | Subterranean | Any | Any | OMII 24 |
| Centipede, Stego- | Any | Temp/Trop | Any | OMII 114 |
| Crane, Giant | Water | Any | Any | OMII 26 |
| Creeper, Scum | Subterranean | Any | Any | OMII 107 |
| Diakk, Broad | Any | Any | Any | OMII 50 |
| Diakk, Tall | Any | Any | Any | OMII 50 |
| Dinosaur, Tennodontosaurus | Water, Ocean | Any | Any | OMII 55 |
| Dog, War, Minimal | Any | Any | Any | OMII 85 |
| Dog, Wild, Minimal | Any | Any | Any | OMII 85 |
| Drelb | Any | Any | Any | OMII 60 |
| Dustdigger | Desert | Temp/Trop | Any | OMII 61 |
| Elemental, Grue, Chaggrin | Any | Any | Any | OMII 72 |
| Elemental, Grue, Harginn | Any | Any | Any | OMII 73 |
| Elemental, Grue, Ildriss | Any | Any | Any | OMII 73 |
| Elemental, Grue, Varrdig | Any | Any | Any | OMII 73 |
| Elemental, Quasi-, Lightning | Any | Any | Any | OMII 103 |
| Elephant, Minimal | Plains | Sub-Trop/Trop | Any | OMII 85 |
| Executioner's Hood | Any | Any | Any | OMII 64 |
| Gorilla, Minimal | Jungle | Tropical | Any | OMII 85 |
| Grim | Any | Any | Any | OMII 72 |
| Hippopotamus, Minimal | Water | Tropical | Any | OMII 85 |
| Horse, Dragon | Any | Any | Any | OMII 59 |
| Horse, Wild, Minimal | Any | Any | Any | OMII 85 |
| Hyena, Minimal | Plains | Temp/Trop | Any | OMII 85 |
| Jaguar, Minimal | Jungle | Tropical | Any | OMII 85 |
| Leopard, Minimal | Jungle | Tropical | Any | OMII 85 |
| Lion, Minimal | Plains | Temp/Trop | Any | OMII 85 |
| Lion, Mountain, Minimal | Any | Temperate | Any | OMII 85 |
| Lynx, Minimal | Forests | Sub-Arctic | Any | OMII 85 |
| Magman | Subterranean | Any | Any | OMII 82 |
| Mammoth, Minimal | Plains | Sub-Arctic | Any | OMII 85 |
| Mandragora | Forests | Temp/Trop | Any | OMII 82 |
| Mantis, Giant | Forests | Any | Any | OMII 83 |
| Mihstu | Subterranean | Any | Any | OMII 84 |
| Pedipalp, Giant | Any | Temp/Trop | Any | OMII 100 |
| Pedipalp, Huge | Any | Temp/Trop | Any | OMII 100 |
| Pedipalp, Large | Any | Temp/Trop | Any | OMII 100 |
| Pseudo-Undead | Any | Any | Any | OMII 102 |
| Ram | Hills/Rough | Temp/SubArc | Any | OMII 104 |
| Rhinoceros, Minimal | Plains | Tropical | Any | OMII 85 |
| Rock Reptile | Hills/Rough | Any | Any | OMII 106 |
| Shade | Any | Any | Any | OMII 108 |
| Solifugid, Giant | Desert | Tropical | Any | OMII 112 |
| Solifugid, Huge | Desert | Tropical | Any | OMII 112 |
| Solifugid, Large | Desert | Tropical | Any | OMII 112 |
| Stag, Minimal | Forests | Temp/Trop | Any | OMII 85 |
| Swordfish | Water, Salt | Any | Any | OMII 117 |
| Thunder Beast | Any | Any | Any | OMII 120 |
| Tiger, Minimal | Forests | Sub-Arc/Trop | Any | OMII 85 |
| Transposer | Any | Any | Any | OMII 121 |
| Vagabond | Any | Any | Any | OMII 123 |
| Vilstrak | Subterranean | Any | Any | OMII 124 |
| Vulchling | Hills/Rough | Any | Any | OMII 125 |
| Warthog, Minimal | Forests | Temp/Trop | Any | OMII 85 |
| Will o' wisp, Boggart | Any | Any | Any | OMII 19 |
| Wolf, Minimal | Any | Temp/SubArc | Any | OMII 85 |
| Wolf-In-Sheep's-Clothing | Plains | Any | Any | OMII 127 |
| Xag-Ya | Any | Any | Any | OMII 128 |
| Xeg-Yi | Any | Any | Any | OMII 128 |
| Yochlol | Any | Any | Any | OMII 130 |