The official GemStone IV encyclopedia.
Towering twice the height of the tallest giantman, the cyclops myopically observes the surrounding terrain through its solitary eye. Aside from these features, the cyclops would appear as any other giantman and is often found wearing animal hides. Blessed with gargantuan strength, the cyclops can wield a 100 pound tree trunk with the same effort that an adventurer wields a dagger. The cyclops, however, is cursed with poor depth perception, limiting the effect of its attack. It is not a good practice to tease the cyclops by calling it 'One Eye.'
Cyclopes wield splintered tree trunks as cudgels.
Magical weapons are required to successfully hit cyclopes.
Cyclopes are very slow, and though their AS is high, they swing very slowly. They are very susceptible to criticals and stuns, but they have a lot of HP (~350). So if one stance-dances effectively and stuns the cyclops, they are easy to knock down and kill.