Games like Ecco: The Tides of Time

If you finished Ecco: The Tides of Time, the closest matches are GreedFall: The Dying World, Stormland, Sword Art Online: Alicization Lycoris, AdventureQuest and Samurai Jack: The Shadow of Aku. All 9 share its adventure genre and are ranked by how closely their themes and modes overlap.