In celebration of this great cinematic creature, here are proposed B/X stats for it -- not substantially different from a standard D&D cyclops, but I figure those cloven hooves make him a bit lighter on his feet (hence the faster movement rate and lowered AC), plus there's his horn attack.
No. Enc. 1 (1d4)
Movement: 120' (40')
Attacks: 1 (Club, Horn or Thrown Rocks)
Damage: 3d10 / 4d6 / 3d6
Hoard Class: XVIII + 5,000 gp
Indigenous to the Novellan Mountains of northern Telengard, the horned cyclops is in most respects identical to its non-horned brethren (see LL p. 69), except that this type may opt to attack with its horn, which inflicts 4d6 damage.