"Can you tell us what happened?"
"Mother of God. Tell you what happened? Sit down. I'll tell you. I've seen the rise of a threat I don't think can be stopped.
What began as a normal skirmish with the Blues turned into an encounter I will never recover from. I'll never be able to turn my mind's eye away from that unspeakable scene of gore and destruction. I pray for death each night now, knowing what's out there, and knowing that it cannot be stopped if it reaches critical mass. Hah... if? It already has.
Our first encounter with the things. "Brussalids," they called them... before they were injected with a foul chemical that turned their insides into some kind of biological horror mankind was not prepared to comprehend.
Things started off tame. We had a squad of 10 men, the Blues 12. As usual, the cowards had to outnumber us to even stand a chance at taking our base, but we could handle them, just as we could handle all the other vermin swarming the site. But when I first saw these things, I knew something was different.
I always used to see single alien species attacking my squadmates (and the Blues) at any given time, not usually large groups of one specific kind, unless it was those bugs of course. Those things could multiply in a hurry when their host monsters were destroyed. But this was different in one major way: our first encounter with them near the Blues' stronghold showed multiple groups immediately. Whatever these things were, they were either appearing as packs... or replicating.
Whatever they were, they were tough to kill, and they charged us back into our own base. I had a group of three or four charge me, but managed to get to higher ground and avoid them. They couldn't seem to project any sort of attacks at long-range, and I wasn't about to find out what happens when you get close. But then others started trailing in... and then LOTS. Before I knew what was happening, my base was filling up with these black abominations, and they were hacking apart all the aliens they could find. Not the usual behavior for these things. They usually teamed up against us.
They were extremely dangerous. My squad was getting eviscerated, and the Blues were nowhere to be found - probably holed up in their sector as I was. Everywhere I went I found more and more of these things. I started to see how they were appearing - aliens and humans alike were getting "infected" at close range, implanted with some kind of egg. After a few seconds, boom - a shower of blood, guts, and another one of these things standing where an ally or enemy once stood.
By the time I knew what had to be done, it was already too late. They were everywhere, swarming the entire site. They were tough to kill, and while not very fast, fast enough. I was cornered in my base in no time, and my allies were unresponsive on the radio. I couldn't even hear any signs of combat from elsewhere over the roar of the snarling horde.
It was at this point that... ahh... GET OUT... GO! GO GO MOVE MOVE GET TO THE EVAC POINT, OH GOD HOLY HELL THEY'RE EVERYWHERE, FUCKING MOVE, MOVE GODDAMNIT JESUS FUCKING CHRIST GET OUTAUAUAGhahahhghgh"
"...is he going to be ok?"
"He's been sedated. We'll have to try again another time, sir."