大航海時代Ⅳ, developed by KOEI TECMO GAMES CO. LTD., is a popular ocean adventure simulation RPG set in the 16th century during the Age of Exploration. Players can take on the role of adventurers, merchants, or military personnel, and create their own human drama with various characters in the same world. The goal is to become the ruler of the seven seas by gaining dominance in each sea area and finding the hidden treasure known as the "Proof of the Conqueror." Explore scattered ruins around the world, decipher maps that reveal the location of treasures, and excavate hidden treasures. With numerous events, the game offers a dramatic and immersive sailing experience. Embark on an adventure and conquer the seas!

The game has been fully adapted for smartphones, with improved graphics and controls to enhance the gameplay experience. It also includes new features such as automatic saving and network connectivity.

大航海時代Ⅳ is a complete game with no additional in-app purchases.