Quick answer
Nova Empire (2017) is a polished mobile-first space MMO: build a station, customize fleets, recruit admirals and fight real-time PvP for sector control in alliance legions. Xterium (2013) is an OGame-lineage 4X: a deeper economy and research tree, fleets and alliance wars (ACS joint attacks, war points), playable in a browser and via native apps, across three universes on one account. Want flashy real-time mobile visuals and a hero/admiral system — Nova Empire. Want deeper economic 4X strategy you can play anywhere — Xterium.
Updated: June 2026
Where Nova Empire
Honestly: Nova Empire does several things better than us. We acknowledge it explicitly.
Polished mobile-first visuals — fleets move across the galaxy in real time
Admiral / hero system that adds collectible progression
Modern mobile UX with casual-friendly onboarding
Cross-platform — mobile plus PC via Steam
Where Xterium is stronger
What we do better — not marketing rhetoric, but verifiable differences.
Deeper 4X economy and a full research tree, not just base + fleet
Playable in any browser and via native apps — no forced install
Alliance wars as the core mechanic with ACS joint attacks and war points
Three universes on one account — different paces and rulesets
Open knowledge base — engine formulas and guides are public
19 tournament types and 5 expedition tracks with automated flights
Xterium vs Nova Empire — parameters
Direct comparison on 8 key parameters. Without embellishments.
| Parameter | Xterium | Nova Empire |
|---|---|---|
| Launch year | 2013 | 2017 |
| Platform | Browser + native iOS/Android | Mobile + PC (Steam) |
| Core loop | 4X economy, research, fleets | Real-time base + fleet action |
| Alliance play | Alliance wars, ACS joint attacks | Legions + sector control |
| Heroes | Senators (advisor bonuses) | Recruitable admirals |
| Worlds | Three universes, one account | Shared galaxy servers |
| Pay-to-win | Premium is convenience, not power | Official "Contains Loot Boxes" label; packs up to $99.99 |
| Development | Regular updates (v2.12.x) | Since Nov 2023 every App Store update says only "Bug fixes" (July 2026) |
| Knowledge base | Open, with engine formulas | In-app + community |
When to pick Xterium
- You want a deeper economy and research strategy, not mostly combat
- You want to play in a browser without installing an app
- You like multiple universes and rulesets on one account
- You value OGame-style depth and open, documented formulas
When to pick Nova Empire
- You want polished, mobile-first real-time visuals
- You enjoy collecting and leveling admiral heroes
- You prefer a more casual, mobile-paced experience
- You mostly play on a phone or via Steam on PC
