I've completed the test and I've been placed in "Steropes". How about you? The ODI is in group "Brontes" and it looks like there is a 3rd group - Polyphemus.
They all appear to be Cyclops.
Hesiod's Cyclops
In the Theogony, the Cyclopes – Arges, Brontes, and Steropes – were the primordial sons of Uranus (Sky) and Gaia (Earth) and brothers of the Hecatonchires. They were giants with a single eye in the middle of their forehead and a foul disposition. According to Hesiod, they were strong, stubborn, and "abrupt of emotion". Collectively they eventually became synonyms for brute strength and power, and their name was invoked in connection with massive masonry. They were often pictured at their forge.
Homer's Cyclopes
The Cyclopes were huge one-eyed monsters that resided on an island with the same name. Commonly, the term "Cyclops" refers to a particular son of Poseidon and Thoosa named Polyphemus who was a Cyclops. Another member of this group of Cyclopes was Telemus, a seer.
http://en.wikipedia.org/wiki/Cyclops