Uncharted Waters Online

Discover yourself in the “Age of Discovery” where you’ll sail out into the uncharted waters! Discover real historical artifacts and mystical legends! Start a company and make enormous fortunes! Fight in fierce sea battles! Whatever your play style, you can play who you want and how you want in UWO!

Developer: KOEI TECMO GAMES CO., LTD.. Publisher: Papaya Play.

Tags: Co-op · PvP, Free to Play, RPG, Adventure.

Steam reviews: Mixed (69% of 401).

Price: Free to play on Steam.

Released 2018-12-19.

Last updated 2026-07-22.

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