RealmScanner
Catalog
Uncharted Waters Online

Uncharted Waters Online

Live

AdventureRPGStrategy

Platforms
Release:
2005
Developer:
Koei, KOEI TECMO GAMES CO., LTD.
Scale:
Average concurrent players19
Player rating:
68.6% · 430
Profile data as of:
September 2, 2026

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!

Official website

Screenshots

Images from the source page, in source order. Select an image to view it full size.

Videos

Videos from the game’s source page, in source order. Select one to open the original.

Overview

Franchise
  • Uncharted Waters (series)
Release date
  • Windows — 2005
  • PlayStation 3 — 2009
  • PlayStation 4 — 2015
Developer
Publisher
Age rating
  • ESRB E10+ — Everyone 10+ · IGDB mirror
  • ClassInd 10 — Ages 10+ · Steam Store
Content warnings
Not specified by the storefront
Interaction modes
MultiplayerOnline PvPOnline co-op
Session capacity
Unknown
Access model
  • Free to play
Monetization
  • In-app purchases
Storefront price
Unknown
Store contents
Unknown
Languages
English

Classification

Genres
AdventureRPGStrategy
Evidence:
Setting and subject matter
Pirates, Naval
Camera
Third-person
Evidence:
Visual style
Unknown
Combat system type
Unknown

Scale

Concurrent players · period average

19

August 16, 2026 — September 15, 2026

under 100over 1 million
Detailed value
19.35
Coverage
Steam
Origin
Published by source
Confidence
Medium — The site's calculation method is not published
Basis
Average concurrent Steam players over 30 days from Steam Charts: 19
Date observed
September 15, 2026
Source
Steam Charts

Concurrent players · period peak

33

August 16, 2026 — September 15, 2026

under 100over 1 million
Coverage
Steam
Origin
Published by source
Confidence
Medium — The site's calculation method is not published
Basis
Peak concurrent Steam players over 30 days from Steam Charts: 33
Date observed
September 15, 2026
Source
Steam Charts
Ratings
  • players68.6% · 430Steam, US storefront · Steam reviews
Last update

Concurrent players

period average · December 2018 — August 2026 · Steam · published by source · Steam Charts

1200
December 2018August 2026
Change over period
−82%decrease from 120 (December 2018) to 22 (August 2026)
Gaps
No gaps in observed months
Observations
93

Mechanics

Key game systems from the Mechanics Catalog. Assessment axes are independent and are not combined into a single score. An unassessed mechanic is unknown, not absent.

  • Clan system

    Not assessed

    A persistent player organization created or recognized by the game itself, with a stable membership, a life beyond one session, a shared identity, functions, and goals.

  • Player economy

    Not assessed

    An in-game system where player decisions materially influence at least part of the production, supply, distribution, or price of in-game value.

  • Territory control

    Not assessed

    A system where players or organizations capture, hold, and use parts of the game world with lasting consequences.

  • Competitive PvP

    Not assessed

    Structured competition between players with rules and a measurable outcome, usually including skill-based matchmaking.

  • Live service and updates

    Not assessed

    A regular rhythm of meaningful updates, including seasons, patches, events, and a roadmap that supports a long product life.

  • Character progression

    Not assessed

    A system for long-term character or account development through levels, skills, equipment, and specializations.

RealmScanner is a research catalog for multiplayer games. Data comes from public sources; coverage and evidence appear beside each assessment.