World of Sea Battle

World of Sea Battle is an open-world naval MMO set in the age of sail, roughly the 16th to the 19th century. You command one ship and nothing else: a schooner at first, maybe a three-decked ship of the line much later on. It all happens in a shared archipelago where trading, exploration, PvE and open PvP sit on the same map.

The economy runs on players. Ships, guns and cargo come out of the community's own production, and prices move with demand and with whatever war is going on. The catalogue runs past fifty vessels, historical and fictional, all of them upgradable and customisable.

The flag system decides who gets to shoot at you. Sail under a peace flag and nobody touches you; raise the black one and you can raid others, with the same open to them. Guilds play one level above that, fighting large-scale port battles for control of the archipelago's cities.

The game is free to play: no entry price, no mandatory subscription. The shop sells a premium account that raises experience and loot and shortens consumable cooldowns, plus premium ships and decorations, consumables that only drop from chests, and the keys to open those chests.

Coins are bought with real money, though you can also earn them: keys looted in PvP zones, purchases from other players at auction, or conversion from the seasonal event currency. That route is slow, and Thera Interactive has published neither a price list nor revenue figures.

In Steam reviews the shop is the recurring subject. Players point at premium ships that outclass their free equivalents, and at costs that pile up in ammunition, insurance and peace time. It's the most consistent complaint the game gets.

It has been in Early Access on Steam since October 21, 2025, after years of development outside the store. The studio expects at least a year and a half in that stage and has given no date for version 1.0.

Thera Interactive ships one major update per quarter. Its 2026 plan lines up four: B19 New Horizon (exploration missions, unique abilities for imperial-class ships, a flag rework and an Asian server), B20 Sea Dominion (four new ships and guild progression), B21 Through the Storm (the Endless Sea expansion and a new shipyard) and B22, with the port battle and city ownership overhaul.

The population is modest and steady: 2,285 players on average over the last thirty days, with monthly averages running from 3,184 in March 2026 to 1,920 in June, and an all-time peak of 5,439. Steam reviews sit at Mostly Positive, 72% across 3,283, and 78% across the 515 from the last month.

This is a game for people who enjoy slow sailing, logistics and guild politics: the archipelago rewards persistence far more than reflexes, and the best of it shows up when there's a crew you know on the other side. Anyone after immediate action, or an even climb without touching the shop, will run into the design.