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Small Reactor   Fusion Reactor   Power Capacitor   Coal Reactor

"Powerful reactor unit. Takes more hull space and requires gas to function."

Level 1 Level 2 Level 3 Level 4 Level 5
Level 6 Level 7 Level 8 Level 9 Level 10
Level 11

Ship Level 1 2 3 4 5 6 7 8 9 10 11 12
Number Available 0 0 0 0 0 0 0 1 1 1 1 1
Icon Abbreviation Size Stat Enhancement AI Category
ReactorIcon.png FRE 4x2 None Reactor
Level PowerPower.png Generated Upgrade Ship Level Required
1 0-3 375K 3d 8
2 0-4 625K 4d 8
3 0-5 850K 6d 9
4 0-6 1M 1w 1d 9
5 0-7 1.3M 1w 3d 10
6 0-8 1.6M 1w 4d 10
7 0-9 2M 1w 5d 10
8 0-10 2.1M 1w 6d 11
9 0-11 2.3M 1w 6d 11
10 0-12 2.5M 2w 11
11 0-13 3.5M 2w 12


The Fusion Reactor is a 4x2 Reactor unlocked at level eight. The Fusion Reactor is meant for mid-late ships, as they struggle to power most rooms only using the power generated from Small Reactors. The Fusion Reactor is by far the largest Starship Reactor and the most efficient one relative to size once at level 8.


Battle Mechanics

The Fusion Reactor will continue to provide power even when it's upgrading, EMP'd, or System Hacked. The Fusion Reactors health bars also influence how much power it generates, with one health bar representing one power. Reactors in general also have some hidden mechanics. The game forces the player to have at least one Reactor on their ship at all times. In addition, if no Reactors on the player's ship are at full HP, the game will automatically give the player a 0% Escape Rate, regardless of the Bridge.

In Combat

The Fusion Reactor is treated similarly to how the Small Reactor is treated, with Landmines or Security Gates helping to protect it from enemy boarders. The Fusion Reactor doesn't need Armor at higher levels due to its massive health, but it's still good to Armor the Fusion Reactor to protect it against Penetrator Missiles.

When To Use

The Fusion Reactor should be used if the player is having a hard time powering their ship. The amount of space the Fusion Reactor takes up may make this hard, so the player might have to rework their layout to get it to fit. At level 9 or 10, it usually becomes mandatory to use the Fusion Reactor due to the immense power upkeep of rooms.


The Fusion Reactor cannot be programmed with AI.

Crew Interactions

The Fusion Reactor cannot be buffed by Crew.


Powered Rooms

Weapon Rooms

Weapon Rooms: Mineral Mining LaserBolterKias PhaserK BlasterMinigunPhoton PhaserPlasma DischargerParticle DischargerLaser BlasterRailgunPhoton DisruptorEMP CannonIon Cannon

Consumable/Platform Rooms: Missile LauncherMulti Missile LauncherHangarTeleportSmall Weapons PlatformMedium Weapons Platform

Defense Rooms

Defends Via Damage: Anti Craft LaserSecurity GateSmall Gas TrapZaki Tentacle GardenDisintegrator Gate

Defends Via Support: Shield GeneratorShield BatteryMed BayToiletFlower GardensAndroid StudioVisiri MechbayZongzi FactoryRadar

Defends Via Dodge: EngineFusion Drive EngineCloak Generator

Support Rooms

Supports Via Healing: Med BayToiletFlower Gardens

Reactors: Small ReactorFusion ReactorCoal ReactorPower CapacitorLarge ReactorBackup Capacitor