| Gelatinous Cube A | 200 | | No | Nature | 50% Arrow 100% Magic Missile 100% Nature 100% Soul 100% Mind 100% Body |
| Gorgar the Pit Fiend | 200 | | Yes | | 15% Blunt 30% Pierce 20% Arrow |
| Gelatinous Cube B | 200 | | No | Nature | 50% Arrow 100% Magic Missile 100% Nature 100% Soul 100% Mind 100% Body |
| Greater Red Dragon | 140 | Dragon | No | Body | 45% Blunt 45% Cut 30% Arrow 70% Magic Missile 80% Nature 80% Soul 80% Mind 100% Body |
| Greater Blue Dragon | 140 | Dragon | No | Mind | 50% Pierce 30% Arrow 70% Magic Missile 80% Nature 80% Soul 70% Mind 80% Body |
| Greater Green Dragon | 140 | Dragon | No | Nature | 50% Blunt 30% Arrow 70% Magic Missile 90% Nature 70% Soul 70% Mind 70% Body |
| Greater Gold Dragon | 140 | Dragon | No | Soul | 40% Cut 30% Arrow 70% Magic Missile 80% Nature 100% Soul 80% Mind 80% Body 100% Poison |
| Guardian of Kuthos | 130 | | No | Blunt | -4% Blunt 30% Pierce 25% Cut 25% Soul 25% Mind |
| Ghoul Lord Yesoth | 115 | | Yes | | 20% Blunt 100% Cut 50% Arrow 100% Poison 100% Disease |
| Ghast | 114 | | No | Soul | -25% Blunt 75% Pierce 75% Cut 60% Soul 50% Mind -10% Body 100% Poison 100% Disease |
| Grasping Tentacles | 114 | | No | Blunt | 20% Blunt 20% Arrow 20% Body 100% Poison 100% Disease |
| Gorilla Shaman | 105 | | No | | -5% Pierce 10% Nature 25% Mind |
| Giant Killer Whale | 105 | Sea Creature | No | | |
| Greater Wyvern | 102 | Wyvern | No | Pierce | 20% Arrow 25% Nature 100% Poison |
| General Thrakk | 100 | | Yes | | 50% Blunt 20% Pierce 20% Cut 20% Arrow 20% Magic Missile 20% Nature -10% Soul 20% Body |
| Giant Squid | 100 | Sea Creature | No | | |
| Green Salamander | 88 | | No | Cut | 25% Soul 25% Mind |
| Goblin War Galleon | 85 | Sea Creature | No | Blunt | |
| Greater Kudo | 82 | | No | Blunt | -4% Blunt 10% Cut |
| Ghoul Spectre | 80 | | No | | -10% Soul 100% Disease |