Short answer
Zvezdnaya Federaciya (Star Federation) is a browser-based space strategy with economy, fleets and expansion. If you are looking for a similar game, Xterium is a space MMO 4X strategy in the same tradition: build colonies, research technology and command fleets — but with alliance wars as the central mechanic, three universes (different tempo) on one account, native iOS and Android apps, an open knowledge base with all formulas, and no pay-to-win. It runs free in any browser and on your phone.
What Zvezdnaya Federaciya is, and who it suits
Zvezdnaya Federaciya (Star Federation) is a browser space strategy: you gather resources, build a base, assemble a fleet and fight other players. If its specific setting and established community matter to you, stay with it. But if the game has gone quieter for you, or you want a deeper alliance meta, a persistent 24/7 world and real synced mobile apps, Xterium is closer in spirit and actively developed. It is not "better or worse" — just a different emphasis: organized team warfare over solo progression.
What Xterium offers same-genre players
If you enjoy browser space strategy, here is what Xterium brings to it.
Alliance wars as core
Dozens of players coordinate attacks, defense and diplomacy. Organized alliance war is the central mechanic, not a side feature.
Three universes
War of Alliances, Classic, Reborn — different balance and tempo on one account. Pick the pace that fits you.
Full mobile apps
Native iOS and Android with push notifications and browser sync — command your empire from your phone.
No pay-to-win
Premium is convenience, not power. Every strategy and victory is reachable for free.
Open knowledge base
Every economy and combat formula is public in the knowledge base — no hidden modifiers.
Persistent universe
Your empire keeps developing while you are away — plan builds, research and fleet movements that resolve over hours.
Xterium — at a glance
What defines Xterium as a browser space strategy.
| Parameter | Xterium | What it means |
|---|---|---|
| Genre | Browser space MMO 4X strategy | Economy, research, fleets, expansion |
| Core mechanic | Alliance wars | Large-scale coordinated PvP with ACS |
| Worlds | Three universes, one account | Different tempo without a new login |
| Mobile | Native iOS + Android | Push notifications, browser sync |
| Monetization | Free, no pay-to-win | Premium is convenience only |
| Knowledge base | Open formulas | Economy and combat fully documented |
If you like the browser space strategy genre, Xterium is a free, persistent, mobile-ready option with alliance wars at the core.