By the by, there was an earlier WD cyclops in WD5:
View attachment 272053
I was first published as by Wayne Shaw in
Alarums & Excursions 9, and then featured in
All The World's Monsters.
Cyclopes: Wayne Shaw, The Portal to Temporalana, in: Alarums & Excursions 9, March 1976 (Amateur Press Association, 1976); Cyclops: Wayne Shaw, in: Jeff Pimper & Steve Perrin (eds.), All the Worlds’ Monsters (The Chaosium, 1977)
I am already aware of this critter, which is pretty close to the standard D&D Cyclops (aka the Cyclops Giant or Lesser Cyclops, to distinguish it from the Greater Cyclopes who assist the god Hephaestus).
There's a fair few other Cyclopes in D&D, or at least other takes on the creature.
Let's see, the
Monster Manual II introduced the Cyclopskin, who are basically mini-me versions of Giant Cyclopes only 7 or 8 feet tall and Al-Qadim has a Desert Cyclops.
In 4E D&D, a Cyclops is a giant from the Feywild with an "evil eye" power.
Oh, and who can forget the two-headed Cyclops, the Biclops!
No, I am not kidding, that's a real D&D monster.
You see, sometimes a Cyclopskin and an Ettin who love each other very much…
Heck, there's already an SRD version of the
Biclops.
The Biclops is from "The Dragon's Bestiary" in
Dragon Magazine #172 and, as far as I know, has never appeared in any official D&D book or adventure.
We've got a 3E conversion in the Creature Catalog, naturally.