Uncharted Waters Online
Developed by KOEI TECMO GAMES CO., LTD. · Published by Papaya Play
At a glance
Overview
An adventure, massively multiplayer, rpg game by KOEI TECMO GAMES CO., LTD., published by Papaya Play — multi-player, mmo, pvp, online pvp.
Steam’s own one-line description: “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/publisher text via the Steam store page.
Reception & community
Review sentiment, ownership and peak-concurrent estimates via SteamSpy; tags are player-voted on Steam. Estimates change over time.
Features & modes
Derived from the gameplay modes and feature categories Steam lists for Uncharted Waters Online.
| Feature | Supported |
|---|---|
| Single-player | No |
| Multiplayer | Yes |
| Co-op | Yes |
| Online co-op | Yes |
| PvP | Yes |
| Cross-platform multiplayer | No |
| Full controller support | No |
| Partial controller support | No |
| Steam Cloud saves | No |
| Steam Achievements | No |
System requirements (PC)
As published on the Steam store page. Requirements can change between updates.
Minimum
- OS *: Windows XP SP2 or above
- Processor: CPU Pentium3-800MHz or above
- Memory: 1 GB RAM
- Graphics: 800×600 or above, High Color display
- DirectX: Version 9.0
- Network: Broadband Internet connection
- Storage: 10 GB available space
Recommended
- OS: Window 10/11
- Processor: Intel Dual Core / Intel i3 / AMD Phenom
- Memory: 4 GB RAM
- Graphics: Nvidia GTX560 / AMD HD7770
- DirectX: Version 9.0c
- Network: Broadband Internet connection
- Storage: 15 GB available space
Supported languages (1)
Uncharted Waters Online FAQ
Answered from the official Steam listing as of June 2026. Where something hasn't been announced, we say so rather than guess.
What kind of game is Uncharted Waters Online?
Steam classifies Uncharted Waters Online as a Adventure, Massively Multiplayer, RPG, Strategy, Free To Play game, developed by KOEI TECMO GAMES CO., LTD.. 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!
Is Uncharted Waters Online free to play?
Yes — Steam lists Uncharted Waters Online as Free to Play.
Is Uncharted Waters Online single-player or multiplayer?
Steam lists these modes for Uncharted Waters Online: Multi-player, MMO, PvP, Online PvP, Co-op, Online Co-op. It’s built around multiplayer — Steam doesn’t list a dedicated single-player mode.
Is Uncharted Waters Online on PlayStation, Xbox, or Switch?
Our data comes from the Steam (PC) store, which lists Uncharted Waters Online for Windows. Console availability isn’t in our Steam-sourced data — check the official site or the console store.
Is Uncharted Waters Online out yet?
Yes — Steam lists a release date of Dec 19, 2018.
What platforms is Uncharted Waters Online on?
Uncharted Waters Online is listed for Windows on the Steam (PC) store. Console availability isn't covered by Steam's PC store data — check the official channels.
Is Uncharted Waters Online single-player or multiplayer?
Steam lists these modes: Multi-player, MMO, PvP, Online PvP, Co-op, Online Co-op.
How much does Uncharted Waters Online cost?
It's free to play, per Steam.
Who made Uncharted Waters Online?
Uncharted Waters Online is developed by KOEI TECMO GAMES CO., LTD. and published by Papaya Play .
Where to get Uncharted Waters Online
We don't sell games or track prices — this links to the official Steam store page.
View on Steam →Listing details from Valve's public Steam store data · official site. Not affiliated with Valve/Steam, Papaya Play .