The man Rennac had grabbed looked at him incredulously, "Our Xeno-Biologist thought of that, then he was killed. We don't have enough smoke for hundreds of millions of bugs. You want to help, aim for the big ones." He shoulders out of Rennac's grip and continued to run the valuable supplies to the defend stations before the tide entered into the kill zone.
The tide was getting louder as it got closer, the bright moon lighting them up in dim, faint illumination. Their dripping teeth and glinting claws hungry for blood. So hungry that they began to trample over each other, growing their tide to four feet off the ground as they tumbled and trampled over each other.
On the walls, the colonists readied themselves for the last time, a few teams manning bigger mechanisms made the first call, "Launch!" They shouted as from their make shift ballistea fired literal 50 gallon drums into the fields in front of the tide, and as they trampled over them, the fuses on the barrels ended and exploded the volatile fuel inside, casting licking flames out and around on the bugs, burning and blasting a few hundred at least, but the bigger effect was the light. The light seemed stun them, even blind them and they scurried away from the bright light, the ones inside suffering with shrieks of agony, but the others giving the fire pile a wide birth.
By now the bugs were within firing range and the war cries came up again, and so did a hail of bullets. They couldn't miss, blasting several into green mush and breaking limbs off of others with simple ease.
Ryder also took the same route, letting out a booming roar and pulling the trigger on his Chain-Gun, sending 6,000 rounds per minute to erupt from his gun in a pleasurable whirring sound. All he had to do was tilt his arm and a trail of corpses formed wherever he aimed.
Yet it didn't seem to be enough, the tide was getting closer on all fronts. Some were slower than others, like the front Ryder had, and the fronts with pyres burning, but the end result was the same, the horde was getting closer.