Stellar Sovereigns

Stellar Sovereigns is a turn-based 4X space strategy game about managing an empire in a customizable, procedurally generated 3D star cluster. You explore solar systems, mine asteroid fields, settle discovered worlds and build trade routes, while protecting your territory from rival empires and hostile forces. Space battles play out in real time, with control over your fleet’s ships, weapons and systems.

Build and govern an empire

Your colonies can grow from settlements into cities as you fund their development and meet the needs of their populations. Population size and approval affect an empire’s wealth, military, industry and political power. Growth depends on how well you meet people’s needs, as well as environmental, social and political factors. You can develop colonies yourself or delegate their development to one of four governor types, each with a set budget.

You influence growth through taxes and tariffs, or spend political resources on stimulus, propaganda and subsidies. Technologies and empire traits also affect development. Traits form a levelling system: you earn points by completing tasks and spend them to strengthen aspects of your empire. Each trait has a political association, and the points you spend place your empire on a political spectrum that determines which forms of government are available to choose from.

As colonies grow, some residents become pioneers, a population group willing and happy to settle on another world. You can transport pioneers and the materials needed to establish colonies aboard Ark vessels.

Trade and logistics

You can establish trade routes to exchange goods domestically and with foreign empires, and to move resources between colonies. Colonial industries produce trade goods as a secondary output, with the amount depending on available planetary resources. Freighters you build and assign carry goods between systems to sell them, while trade routes also link systems into chains through which resources can be transferred between any two systems in the chain. These shipments can supply necessities such as food to starving colonies or luxuries that improve approval.

Freighters can be intercepted, destroyed and looted by pirates or rival empires. Fleets can wait at a route’s midpoint or in connected systems to intercept passing freighters unless defending forces stop them. A global Exchange market lets you buy and sell resources, with prices that fluctuate according to demand among empires.

Research and diplomacy

The technology tree has 22 branches, covering different game features and weapon types. Research costs resources, though accumulated research bonuses can offset the cost. You can rush research at the risk of setbacks, while Eureka moments can complete it instantly. Multiple technologies can be researched at once, limited by your budget.

Diplomatic options depend on each empire’s position on the relationship Scala. Relations range from hostility, which can lead to a declaration of war, to a joint victory pact. Political compatibility influences relations over time, with empires whose governments share a political axis being more compatible. Diplomatic events let you influence relations through your responses, while border friction, interceptions and piracy can worsen them. Gifts and treaty offers can improve relations if the other empire accepts them. You can fight unfriendly forces in neutral territory unless a pact or truce forbids it, but attacking a rival system requires a formal declaration of war.

Fleet combat

Battles take place in real time, with control over ships’ subsystems, weapons, repairs, abilities and targeting. You can manage these directly or set automation options for each vessel. Ships use simulated projectiles that can be dodged, beams that can misalign and missiles that can miss. Location-based hits can damage individual ship sections and turrets, and combat also includes jamming and interception countermeasures.

You can manage power for shields, sensors, engines and ECM, and assign repair crews to fix breaches and restore turrets. Sensors use line of sight based on power-signature thresholds. Weapons and abilities can be turreted or directional, guided or unguided, and you can target turrets or sections to disable weapons or attack weakened hulls. Damage can leave persistent debuffs until the ship is repaired at a shipyard.

Battles have a limited duration determined by the point in the movement-execution phase when combat begins. Fleets can converge on a location during that phase and trigger a battle on contact with an enemy. Later-arriving fleets join in order, at a time relative to when the battle began. Battles can continue across multiple turns, allowing strategic decisions between turns.

Destroyed vessels leave wreckage that can be salvaged for resources and sometimes technology. Ships have default loadouts rather than fixed designs, and you can retrofit them with new weapons, modules and other equipment. Retrofitting lets you adjust vessels to your preferences and refit them with newer technologies. A test arena lets you try ships against weapon platforms and menace ships in a simulated environment.

Explore and defend

You can mine asteroid fields, establish colonies and connect them to civilization with trade routes. Shipyards and stations can provide mining and research bonuses, while orbital weapon platforms provide static defences. You also need space forces and orbital and ground defences to protect your domain from rival empires and roaming pirate, sectoid and machine AI fleets.

Your fleet includes capital and escort class vessels, which you can outfit with different technologies and weapons. You can also build defences for your colonies and systems as you expand across the star cluster.