The Unstable Reactor powers a ship's engines with dangerous volatile fuel that detonates on ship death. Additional ship health increases the explosion intensity.
  — In-Game Description 


Unstable Reactor I
Ship Mass 8% 11% 14%
Power 750 Ex 1,000 Ex 1,300 Ex
AoE Radius 1,500 m
Speed +30 m/s +50 m/s +70 m/s
Turning +3.0 deg/s +5.0 deg/s +7.0 deg/s
Strafe -20% -26% -33%
Hull XP 1,330 XP 1,762 XP 2,207 XP
Restricted to Iron Star Company
BLUEPRINT CompleteBlueprint
Ship Lab Required VI VII VIII
EQUIP ModuleRefit
Time Time 43m 00s 1h 57m 3h 39m
Helium-3 Helium3 636,591 1,795,072 3,236,340
Antimatter Antimatter 112,340 448,768 1,078,780


The Unstable Reactor is a unique thruster that functions similarly to Fusion Thrusters speed-wise, but has the added ability to explode for massive damage upon destruction of the ship. It is restricted to Iron Star Company Hulls.

The damage of the explosion scales up with both the power and the total health of the ship as shown on the stat card.

Strategy and Setup


UR 2

Python Cutters explode to a devastating effect on Apocrypha Cruisers

Unstable Reactors are very effective in close combat because your ships will wipe out anything nearby when they are destroyed. Naturally, Python Cutters and Hurricane Frigates are the first choice in fleet combat as their speed enables them to effortlessly face-hug enemy ships as they die. Unstable Heretic Cruisers excel in base rushes, with each explosion significantly damaging many modules at once due to the cruisers' high health.

They are also used on Vigilante Battleships, Machete Destroyers and Freyja Carriers as an anti-blitz weapon to counter attacks from cutters and to some extent, frigates. Note that damaged ships will still explode with respect to their maximum health, i.e. the explosion power is not affected by any damage taken prior to combat, making microrep (10% health, the minimum percentage required for a ship to be launched) fleets extremely deadly.

Unstable Reactors have much lower XP than Fusion Thrusters, making them the standard thruster for low-level Iron Star Company fleets.


UR 8

Unstable Reactor's large explosion radius

Unstable Reactors take up almost double the mass but are slightly slower than Fusion Thrusters. Their ability is activated only when the ship is destroyed, and requires lots of health (aka repair time) in order to be effective. Be prepared to make sacrifices if you have this thruster equipped.

Unstable Reactors have a large but finite explosion radius; slower ships may not be able to deal any damage if the enemy knows that you have this thruster equipped and is actively trying to keep distance to avoid being destroyed.


  • The Unstable Reactor is the first suicide thruster ever introduced.
  • Players speculated that the Unstable Reactor incorporated a resistor prior to its release.
  • It is unofficially and informally known as the Allahu Akbar Reactor or the ISIS Thrusters.
  • Ships equipped with this thruster fighting point-blank against others with the same thruster often end in a chain reaction of explosions, sometimes resulting in a draw.
  • The Unstable Reactor's damage output was significantly reduced sometime after release here, though the "Power" stat remained unchanged.
  • This is the only special made by the Iron Star Company.



What do you think of the unstable reactor

The poll was created at 17:10 on November 21, 2016, and so far 34 people voted.