If you liked this
Games like Dungeons & Dragons Online: Trials of the Archons
If you finished Dungeons & Dragons Online: Trials of the Archons, the closest matches are Yu-Gi-Oh! GX Tag Force 2, AdventureQuest, Zio and the Magic Scrolls, Irori and Dungenious. All 10 share its role-playing (rpg) genre and are ranked by how closely their themes and modes overlap.
