The Age of COnan

Monsters and Treasure
Many monsters, heroes, and gods of the Hyborian Age are listed in
Supplement IV: Gods, Demi-Gods, and Heroes, pages 45-52, with even more
creatures applicable to the age listed throughout (see the Finnish mythology
section in particular).
are appropriate to the Hyborian Age:
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There are many more monsters in
D&D—even standards—that are
appropriate for encounters in the
Hyborian Age. A complete list
appears below, but in general if
it's a creepy crawly, has a horrific,
unnatural, or Lovecraftian bent, is
undead, or is some sort of mutated
take on a regular creature, it's
likely appropriate to the Hyborian
Age. Indeed, it is rarely
necessary to concoct new
monsters for a Hyborian Age
game, particularly since the stats
in D&D are so basic. Simply use
an appropriate set of statistics
from a pre-existing monster, and
invent a good, uniquely
grotesque, unnatural, or horrific
description for it.
Of the creatures listed in Monsters
& Treasure, the following critters
Men (obviously) will be the most often encountered foe.
Goblins and Kobolds can be used to represent degenerate underground
pygmy races.*
Gnolls and Ogres should be used to mimic beast-men and carnivorous
apes.*
Skeletons/Zombies
Ghouls, Wights, Wraiths, Spectres, Mummies, Vampires and all
manner of undead are applicable.
Basiliks, while not strictly Hyborian in nature, do fit in the concept of
a giant serpent whose bite causes petrification.
Wyverns are similar to the "dragons" Conan and Valeria encounter in
"Red Nails."
Lycanthropes