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What changed in each version of Astro Empires, with a link to compare each version with the one before it in the game tables.
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Compiled from the official forum reference thread: Main differences between game versions

Jump to a version: 233.544.54.65

Version 2

Release announcement
  • Introduced fleet maintenance.
  • Introduced the home planet, now on all servers.
  • Decreased costs for commanders.
  • Maximum number of guild members reduced from 250 to 200.
  • Each level of the Economic Centers increases base economy by 4 instead of 3.
  • Each level of the Capital increases other bases' economy by 2 instead of 1.
  • New base cost adjustment, adjusted again later.
Compare these versions in the game tables

Version 3

Release announcement
  • Guild size reduced to 50 members.
  • Fleet maintenance capped at 30% of a player's economy.
  • All players start with the same astro type and position.
  • Adjusted astro types.
  • Unit balance changes.
  • Stealth technology.
  • Research Labs' research capacity increased from 6 to 8.
  • Jump Gate energy consumption increased from 8 to 12.
  • No wormholes.
  • Reduction in the minimum pillage value.
Compare these versions in the game tables

Version 3.5

Release announcement
  • Building a Planetary Shield or Planetary Ring costs 60% on moons and 50% on asteroids.
  • Bases with Jump Gates are not protected by newbie rules (this version only).
  • Recyclers can jump one galaxy without a Jump Gate.
  • Commanders past level 8 can only be trained with XP.
  • Economic structures have a cool-down when downgrading.

Version 4

Release announcement
  • Introduced combat loot.
  • Pumpkin map, with a trade adjustment.
  • Double production cost reduced from +100% to +40%.
  • Defense status adjustment.
  • Jump Gate speed bonus reduced from 100% per level to 70%.
  • Wormholes reintroduced with different mechanics.
  • Drekon quantity adjustment.
  • Bases can no longer be built at wormhole locations (since the Bolt server).
Compare these versions in the game tables

Version 4.5

Release announcement
  • Removed the hourly credit cost of fleet maintenance.
  • Player fleets are limited by total production capacity.
  • Economic Centers' economy decreased from 4 to 3.
  • The Capital bonus for all bases decreased from 2 to 1.
  • Asteroids' crystals decreased from 3 to 2.
  • Crystallines' crystals decreased from 4 to 3.
  • Revised level protection, extending beyond level 30 with no upper limit.
  • Fleet detection time reduced by one third.
Compare these versions in the game tables

Version 4.6

Release announcement
  • Pillage value is no longer based on a player's available credits.
  • Production cancellations refund 100% of spent credits, up from 75%.
  • Loot rewards credits directly; the base discount option is removed.
Compare these versions in the game tables

Version 5

Release announcement
  • Major unit balance changes.
  • All units and defenses with Ion weapons deal 50% cross-shield damage.
  • Each galaxy starts with 5 United Colonies bases, up from 4.
Compare these versions in the game tables