Games Like Five Starless Rivers

Follow an undergraduate student as he tries to find the hidden Helm of Hades by navigating the five underground rivers of his domain and at the same time try to figure out school, love, friendships, and life in contemporary Athens while a shadow organization (there's always one) wants the Helm for their own purposes... And there's also the problem of telling his parents he's going to need that extra semester(s) after all...