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Everything About the Arsenal in Xterium — Fleet Leveling, Upgrades, and Ships

A Guide to Xterium's Arsenal: How the arsenal and upgrades work, how to level up your fleet, and which ships to choose. Mechanics, guides, and terminology—all in one place.

4 min Updated 2026-06-21 Collections Verified by the Xterium team
On this page
  1. Where to Start Leveling Up
  2. How Arsenal Works
  3. Continuous Improvement Through Modernization
  4. What to download for your arsenal
  5. What Kinds of Ships to Use in Battle
  6. Related Resources
  7. Frequently Asked Questions

Your arsenal is the strength of your fleet. Two players with identical ships fight differently: it all comes down to upgrading your arsenal and upgrades. Here you’ll find everything you need to know about strengthening your fleet: how to upgrade your arsenal, what upgrades offer, and which ships to choose.

Where to Start Leveling Up

Featured article — a guide “How to Level Up Your Arsenal”: what to level up first, how to avoid spreading your resources too thin, and how to maximize your power with minimal investment.

How Arsenal Works

Mechanics “How the Arsenal Works” explains where the fleet’s strength comes from, how its cost increases, and why the arsenal is more important than just the number of ships.

Continuous Improvement Through Modernization

Upgrades provide permanent bonuses to your fleet and buildings. A complete list with descriptions of each one can be found in the Upgrades section of the encyclopedia.

What to download for your arsenal

All levels and effects of the arsenal are listed in the Arsenal section of the encyclopedia: what each upgrade provides and in what order to unlock them.

What Kinds of Ships to Use in Battle

The true power of your arsenal is realized through the right fleet. The Ships section of the encyclopedia shows which ships are effective against which others and what fleet composition to assemble for your specific mission.

Frequently Asked Questions

Which is more important—the number of ships or the arsenal? Two players with identical ships fight differently: it all comes down to upgrading their arsenals and upgrades. The arsenal is more important than the sheer number of ships.

Where should I start when upgrading my arsenal? Featured Article — "How to Level Up Your Arsenal" Guide: What to Level Up First, How to Avoid Wasting Resources, and How to Maximize Your Power with Minimal Investment.

How do upgrades differ from the arsenal? Upgrades provide permanent bonuses to your fleet and buildings. They work in conjunction with the arsenal and strengthen your fleet over the long term.

How do I choose ships for my fleet? The strength of your arsenal is realized through the right fleet. The “Ships” section shows which ships are effective against which others and what fleet composition to assemble.

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