Quick answer
Astro Empires (2006) is a classic browser space-empire MMO built around one huge persistent universe and layered guild diplomacy — Non-Aggression Pacts, Mutual Defense Pacts and full alliances between guilds. Xterium (2013) keeps the same 4X depth — bases, research, fleets — but centers on alliance wars (ACS joint attacks, war points), adds native iOS/Android apps, three universes on one account and a modern UI with an open knowledge base. Want one massive persistent universe and deep diplomacy — Astro Empires. Want alliance wars as the core, real mobile apps and multiple paces — Xterium.
Updated: June 2026
Where Astro Empires
Honestly: Astro Empires does several things better than us. We acknowledge it explicitly.
One huge persistent universe — dozens of galaxies, thousands of systems
Long legacy (since 2006) with an experienced, established community
Deep multi-tier diplomacy — NAP, MDP and full alliances between guilds
Mature, well-understood balance after nearly two decades
Where Xterium is stronger
What we do better — not marketing rhetoric, but verifiable differences.
Alliance wars as the core mechanic — ACS joint attacks and war points
Native iOS + Android apps (Astro Empires is browser, desktop-first)
Three universes on one account — different paces without a new login
Modern UI/UX and onboarding, not a 2000s web layout
Open knowledge base — engine formulas and stat-rich guides are public
3 alliance factions with 42 bonuses and a division-based alliance championship
Xterium vs Astro Empires — parameters
Direct comparison on 8 key parameters. Without embellishments.
| Parameter | Xterium | Astro Empires |
|---|---|---|
| Launch year | 2013 | 2006 |
| Genre | 4X space strategy (empire + fleets) | 4X space strategy (empire + fleets) |
| Alliance wars | Core mechanic, ACS joint attacks | Guild pacts (NAP/MDP) + alliances |
| Mobile apps | Native iOS + Android, push | Own Android app officially deprecated — mobile browser only (July 2026) |
| Worlds | Three universes, one account | One massive persistent universe |
| Pace | WoA x1, Classic x1, Reborn x2-x5 | Single steady persistent pace |
| Knowledge base | Open, with engine formulas | Community wikis |
| Pay-to-win | Premium is convenience, not power | Premium account gives bonuses |
When to pick Xterium
- You want alliance wars as the core, not an optional layer
- You play on mobile and want a native app, not a browser tab
- You like trying different paces (classic + seasonal) on one account
- You value a modern interface and an open, documented economy
When to pick Astro Empires
- You want one single massive persistent universe
- You enjoy deep multi-tier diplomacy (NAP/MDP/alliances)
- You prefer a mature, two-decade-old balance and meta
- You are happy playing in a desktop browser
