Victory & score

The game always ends at turn 500, in 2459. Before that, there are two ways to win outright.

The Sun Ring

Complete every segment of a ring around the star. It is the longest project in the game, built in steps:

1. Reach the star's Deep Space orbitResearch Deep-Space Craft.
2. Supply Dark MatterResearch Dark Matter Theory and build Deep-space collector.
3. Lay the FoundationResearch Graviton Engineering and build Dyson Scaffold.
4. Build one arc from each yard worldResearch Stellar Engineering and build Ringworks yard.
5. Close an arc and receive its beamResearch Field Manipulation and build Field anchor.
6. Cut each arc from 8 turns to 6 (optional)Research Ring Assembly and build Stellar Foundry.

Expansion

Control at least the set share of the system's landable bodies for 10 consecutive turns. The default is 90%, and you can set anything from 50% to 100% when you create the game. Gas giants don't count. You can get there by conquest, or by diplomacy: vassals and members of a federation you lead count at a reduced weight.

Score

If nobody has won by turn 500, the highest score wins. Difficulty scales the final score.

Defeat

You are defeated when you hold no city and no unit able to found one, or when another player wins.