In the browser
No download, on any PC. Open and play.
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Android and iOS apps. Push notifications, browser sync.
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A real MMO with alliance wars 24/7.
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Full game without subscriptions or pay-to-win.
Learn moreOGame alternative
A modern replacement with alliance wars and a mobile client.
Learn moreTeam play
Alliances are the core of Xterium. Diplomacy and shared victories.
Learn moreBest MMO ranking
An honest TOP-10 of free browser MMOs of 2026 — with the pros and cons of each.
Learn moreLooking for a DarkOrbit alternative?
Xterium is a space MMO strategy: instead of piloting one ship in live combat, you build an empire, command fleets and wage alliance wars across three persistent universes — with native mobile apps and no pay-to-win grind.
Learn moreLooking for an Xcraft alternative?
Xterium is a browser space MMO strategy: build an empire, command fleets and wage alliance wars across three persistent universes — with native mobile apps. A different pace from real-time micro.
Learn moreLooking for a Hades' Star alternative?
Hades' Star is a mobile space strategy with real-time modules and co-op corporations. Xterium is the same genre on a bigger canvas: a persistent browser-and-mobile MMO 4X with full PvP alliance wars, three universes on one account — free, no pay-to-win.
Learn moreLooking for a game like Zvezdnaya Federaciya?
Zvezdnaya Federaciya (Star Federation) is a browser space strategy. Xterium is the same genre — economy, fleets and galactic expansion — with alliance wars at its core, three persistent universes on one account and full native mobile apps. Free, no pay-to-win.
Learn moreA planet colonization game — Xterium
Want a game about colonizing planets? In Xterium colonization is the foundation: settle new worlds, develop their economy, defend them and expand your empire across the galaxy. Free browser space strategy with mobile apps.
Learn moreBest mobile space strategies for 2026 — ranked
Which space strategy is actually worth playing on your phone? We rank the main mobile space MMOs, explain what makes a good one — native apps, push, sync — and where each fits.
Learn moreOnline strategy ranking 2026
18 games scored across 6 criteria: open methodology, every score justified, category winners.
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