PCGame

Uncharted Waters Online

Open-world sailing MMO built around exploration, trade, and piracy

KOEI TECMO GAMES CO., LTD. · Published by Papaya Play · Released Dec 19, 2018

AdventureMassively MultiplayerRPGStrategyFree To Play

Third-party account required

Reviews
Mixed
68% of 461
Recent reviews
Not enough recent
Players
23
daily peak, Nov 7, 2026
Steam Deck
Untested
Last update on Steam
11 months ago
Nov 19, 2025
Minimum PC
800×600
1 GB RAM · 10 GB disk
Full requirements

What is Uncharted Waters Online?

Uncharted Waters Online is a free-to-play sailing MMO set during the Golden Age of Exploration. In its open world, you captain ships, explore, take quests, trade, and fight at sea while developing skills and customizing your fleet.

For you if...

  • +you like exploring a wide world by ship
  • +you enjoy trading and developing a merchant captain
  • +you want to sail and complete quests with others

Not for you if...

  • −you want fast progress without a long leveling grind
  • −you prefer a guided campaign over open-ended sailing

What players say

68% of 461 reviews are positive

Some players praise the sense of discovery at sea and the help they receive from other captains. Experienced players criticize the time needed to progress and pressure to spend; they also say a newer server has split the player base.

Players over time

▲ +1% vs a month ago

Players online on Steam, one sample a day.

Highest since Sep 2026: 33 players on Nov 3, 2026.

Show the data
DayPlayers
Nov 7, 202623
Nov 6, 202617
Nov 5, 202615
Nov 4, 202615
Nov 3, 202633
Nov 2, 202623
Nov 1, 202628
Oct 31, 202622
Oct 30, 202611
Oct 29, 202620
Oct 28, 202617
Oct 27, 202615
Oct 26, 202627
Oct 25, 202623
Oct 24, 202619
Oct 23, 202622
Oct 22, 202620
Oct 21, 202618
Oct 20, 202622
Oct 19, 202623
Oct 18, 202619
Oct 17, 202621
Oct 16, 202618
Oct 15, 202613
Oct 14, 202617
Oct 13, 202616
Oct 12, 202619
Oct 11, 202622
Oct 10, 202626
Oct 9, 202618
Oct 8, 202610
Oct 7, 202627
Oct 6, 202622
Oct 5, 202627
Oct 4, 202623
Oct 3, 202620
Oct 2, 202623
Oct 1, 202625
Sep 30, 202622
Sep 29, 202626
Sep 28, 202618
Sep 27, 202624
Sep 26, 202620
Sep 25, 202621
Sep 24, 202621
Sep 23, 202611
Sep 23, 202624
Sep 22, 202618
Sep 21, 202619

Screenshots and trailer

Uncharted Waters Online screenshot 1

Uncharted Waters Online system requirements

Minimum: 800×600, 1 GB RAM, 10 GB of disk space.

As published by the developer.

Can my PC run Uncharted Waters Online?

The published requirements do not name a graphics card we can compare.

Set up my PC →

Minimum

OS
Windows XP SP2 or above
Processor
CPU Pentium3-800MHz or above
Graphics
800×600 or above, High Color display
Memory
1 GB RAM
Storage
10 GB available space
DirectX
Version 9.0

Recommended

OS
Window 10/11
Processor
Intel Dual Core / Intel i3 / AMD Phenom
Graphics
Nvidia GTX560 / AMD HD7770
Memory
4 GB RAM
Storage
15 GB available space
DirectX
Version 9.0c

Does Uncharted Waters Online have co-op or multiplayer?

Yes: co-op online; PvP online; MMO. There is no single-player mode.

Does Uncharted Waters Online run on Steam Deck?

Untested Not yet tested by Valve on Steam Deck.

PC version details

DRM
None declared on Steam
Third-party account
Papaya Play (Supports Linking to Steam Account)
Controller
Keyboard and mouse
Platforms
Windows
Steam features
Family Sharing, In-app purchases
Languages
Full audio: English.

Does Uncharted Waters Online use AI-generated content?

No AI-generated content is disclosed on the game's Steam page.

Self-reported by the developer under Steam rules: it covers AI content that ships in the game, not tools used to make it. Steam page checked on Oct 25, 2026. How to filter AI games on Steam

Tags

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