This Dragon Quest VI: Realms of Reverie update has plenty of towns, a few dungeons, and an underwater area. Just like the original game, you travel through the real world, dream world, and dive into the ocean with a ship encased by a bubble.
Like talking to monsters? Artepiazza, the developer of the Dragon Quest IV and V remakes, are incorporating the party talk system into Dragon Quest VI: Realms of Reverie. So you can have chats with hero slimes and allies like Barbara, the game’s black mage.