Core components

Version

This article is considered accurate for the current version (2.3) of the game.

This article is for the PC version of Stellaris only.

Ships

Ship designer

Core components

Weapon components

Utility components

On the right side of the designer, one can select options for different subsystems of the ship. Most of them are required and it is not possible to design a ship without some version of them, but few of them are optional, having the option to install no subsystem in its slot.

Reactor

A ship's reactor generates power for its other systems, and a new ship design cannot be created if it has negative power. Excess power slightly increases a ship's evasion, movement speed, and damage.

Reactor	Corvette		Destroyer		Cruiser		Battleship		Titan		Defense platform
	Cost	Power	Cost	Power	Cost	Power	Cost	Power	Cost	Power	Cost	Power
Fission Reactor	10	75	20	140	40	280	80	550	160	1100	20	200
Fusion Reactor	13	100	26	180	52	360	104	720	208	1450	26	260
Cold Fusion Reactor	17	130	34	240	68	480	136	950	272	1900	34	340
Antimatter Reactor	22	170	44	320	88	620	176	1250	352	2500	44	440
Zero-Point Reactor	28	220	56	430	112	800	224	1550	448	3200	56	575
Dark Matter Reactor	37 1	285	74 2	550	148 4	1030	296 8	2000	592 16	4200	74 4	750

FTL drive

Main article: FTL

This subsystem is optional, although without an FTL drive the ship is incapable of moving between systems.

Jump drives allow the ship to make a direct jump within a limited range. After jumping the fleet spends 200 days recharging, during which time it suffers -50% sublight speed and weapons damage.

FTL drive	Cost	Power	Jump charge time	Other
Hyper Drive I	5	10
Hyper Drive II	10	15	-25%
Hyper Drive III	15	20	-50%
Jump Drive	20	30	-70%	Can make jumps outside the hyperlane network
Psi Jump Drive	20	30	-80%	Can make jumps outside the hyperlane network with +50% greater range

Computer system

This component predominantly improves fire-rate as well as various performance, like evasion, tracking, accuracy, or weapons range, depending on behavior type.

Behaviors

When in combat, every military ship will advance to within a certain distance of its target and fire its weapons, while staying at the intended distance. The engagement range is determined by the ship's designated role and will apply regardless of the effective range of the ship's weapons. Weapon range modifiers will also increase this range. Ships that have similar roles will typically cluster together, stay in formation with each other and attack in groups.

• Swarm: The ship will charge straight into point-blank range with its target, circle around it, and attack.
• Picket: The ship will move to close range (30) and attack from a position, attempting to intercept incoming enemy ships.
• Line: The ship will advance to medium range (50), assume formation and then attack everything within range.
• Artillery: The ship will stay at long range (80) and engage its target from far away. (Mostly applies against stationary targets, everything else is engaged as usual, i.e the ship will attack it as soon as it gets within range)
• Defense Platforms may somewhat reposition themselves around the starbase, but mostly stay in place and attack everything that gets within their range, dealing as much damage as possible.

Level	Cost Power	Effects
		Swarm	Picket	Line	Artillery	Platform	Starbase
Basic	5	Default for corvette	Default for destroyer	Default for cruiser Default for battleship	Default for titan	Default for defense platform +20 Tracking	Default for starbase +5% Fire rate +10 Tracking
Specialized	5 10	+5% Fire rate +5% Evasion	+5% Fire rate +10 Tracking	+5% Fire rate +5% Ship accuracy	+5% Fire rate +5% Weapons range	+5% Fire rate +5 Tracking	+10% Fire rate +20 Tracking
Advanced	10 15	+10% Fire rate +10% Evasion	+10% Fire rate +20 Tracking	+10% Fire rate +10% Ship accuracy	+10% Fire rate +10% Weapons range	+10% Fire rate +10 Tracking	+15% Fire rate +30 Tracking
Sapient Autonomous	20 25	+15% Fire rate +25% Evasion	+15% Fire rate +10% Evasion +30 Tracking	+20% Fire rate +20% Ship accuracy	+20% Fire rate +20% Weapons range	+15% Fire rate +15 Tracking +10% Ship accuracy	n/a
Precognitive	20 25	+15% Fire rate +15% Evasion +20% Sublight speed	+20% Fire rate +40 Tracking	+15% Fire rate +15% Ship accuracy +10 Tracking	+15% Fire rate +15% Weapons range +10 Tracking	+15% Fire rate +25 Tracking	n/a
Allowed ship types		Corvette	Corvette Destroyer Cruiser	Destroyer Cruiser Battleship	Destroyer Cruiser Battleship Titan	Defense platform	Starbase

Sublight thrusters

The sublight thrusters determine how fast the ship maneuvers within a star system. They also increase the chance to evade enemy attacks in combat.

Name	Cost per	per		Evasion					Description
				Corvette	Destroyer	Cruiser	Battleship	Titan
Chemical Thrusters	3	10							Simple yet moderately effective chemical thrusters that rely on combustible propellant to generate thrust.
Ion Thrusters	6	15	+25%	+5	+4	+3	+2	+1	These electric thrusters use beams of ions to generate thrust without the need for propellant.
Plasma Thrusters	9	20	+50%	+10	+8	+6	+4	+2	An advanced form of electric propulsion, plasma thrusters afford ships greater sublight speeds and maneuverability.
Impulse Thrusters	12	25	+75%	+15	+12	+9	+6	+3	These highly advanced fusion-powered thrusters provide ships with unmatched maneuverability and speed under sublight conditions.
Dark Matter Thrusters	12 1	30	+125%	+20	+16	+12	+8	+4	These thrusters utilize Dark Matter technology to generate propulsion in a manner that appears to defy numerous laws of physics.

Sensors

Sensors determine the ship's detection range on the galaxy map. They also increase tracking of all weapon systems, which is related to accuracy.

Sensor's Hyperlane detection range is always equal to 2 × Sensor Range.

Name	Cost	Power	Tracking	Sensor Range	Description
Radar System	2	5		1	A planet-bound technology adapted for use in deep space, the radar system provides basic detection and tracking capability for interstellar vessels.
Gravitic Sensors	4	10	+5	2	These sensors have been tuned to look for any gravitational changes in space, such as those produced by the presence of a starship.
Subspace Sensors	6	15	+10	3	Sensors that detect subspace fluctuations left in the wake of traveling starships. Their sensitivity and range and greater than that of a gravitic sensor array.
Tachyon Sensors	8	20	+15	4	Advanced sensors that rely on rotating tachyon beams to detect ship movements even at extreme distances.

Aura

This optional subsystem for Titans projects an aura around the ship which causes all enemy ships that enter it to suffer a penalty while giving a bonus to all friendly ships that enter it. While optional, they do not cost anything.

Multiples of the same aura do not stack.

Aura	Type	Aura effect
Shield Dampener	Offensive	-20% Shield Hit Points on Hostile Ships
Quantum Destabilizer	Offensive	-10% Fire Rate on Hostile Ships
Subspace Snare	Offensive	+100% Emergency FTL Jump Cooldown on Hostile Ships -20% Combat Disengagement Chance on Hostile Ships
Inspiring Presence	Defensive	+5% Fire Rate on Own Fleet
Targeting Grid	Defensive	+10% Tracking on Own Fleet
Nanobot Cloud	Defensive	+1 Daily Hull Regen on Own Fleet +3 Daily Armor Regen on Own Fleet

References

Game concepts