Open-world MMO
World of Sea Battle
Pirate guilds, an online Age-of-Sail MMO, an open-world sandbox and ship combat with PvP/PvE/RvR activity. Best fit for players who want a persistent naval world and are comfortable with a developing game.
Source: official action page. Sources last checked: Aug 31, 2026. Details can change; check the linked official source for the latest information.
Free live-server MMO
Pirates of the Burning Sea
A PC pirate MMO with live-server access described as free, while the Legacy server requires a subscription. Best fit for players who want a long-running online pirate world and can distinguish the server models.
Source: official download page. Sources last checked: Aug 31, 2026. Live Servers and Legacy are separate versions.
Fantasy pirate MMO
Pirate101
A PC pirate MMO with skyway sailing and a limited free area; membership and Crowns unlock more content. Ship combat is presented in a fantasy format, not as realistic naval simulation.
Source: official free-game page. Sources last checked: Aug 31, 2026. Free access does not necessarily include every feature or purchase.
Free-trial pirate action
Skull and Bones
A PC pirate action game with ship-to-ship combat and a free trial listed by Ubisoft. It belongs here as a comparison point, not as a free-to-play full-game recommendation.
Source: official Ubisoft page. Sources last checked: Aug 31, 2026. A free trial is not the same as full free-to-play access.