The game set in Bromjunaar is called The Labyrinth. It is found under Learn > Games > The Labyrinth, or through this link.

If you mean the Dragon Cult Contest, it was a submission of a work in Dovahzul about the Dragon Cult.

If you meant any of the games Thuum offers, you can find them under "games" in the "learn" section.  like Forelnaar.