|Fusion pulse cannon|
|A few seconds|
The fusion pulse cannon is the default secondary firing mode for the railgun. It's a little more complex to use than the Impact Grenade or Flak Grenade. Hold down the second trigger to start energizing the fusion coils. A red orb of plasmasical energy will start to inflate in front of the weapon; when it turns blue you can release the trigger to fire it. The orb travels fairly slowly in a straight line towards enemies and will do decent damage if it hits something, but that's not how to use it best. If you shoot the orb mid-flight, it will explode and do heavy damage to anything in a fairly large area.
The warmup time and large blast radius of this weapon make it risky to use at close range, and it can be hard to know when the orb is at the right distance to detonate it at long range. As a potentially very powerful weapon that is easy to get your hands on, though, it can be worth the time to master. A new life with your limbs re-attached is only a press of the C key away...