Exactly four hours down to the second after the first forces from Chiron arrived on Megaprimus, the counter attack on the Alien Dimension began.
The invasion itself was truly something to behold.
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XCOM craft were the first ones to breach the Alien Dimension, followed by my aircraft (now modified to survive entering the dimension gates) and then by the craft of the colonies of Chiron. Almost immediately, we came under fire: mostly from alien ships like in the game, but also, to my surprise, from gun emplacements in the surface of the Alien Dimension. All of these tried to shoot our forces down. All of them tried in vain and were soon put out of their misery.
Once all opposition was eliminated, my forces split off into separate groups, all dedicated to different goals: My interceptors assisted XCOM's forces in mopping up the sky, my transports moved to find a suitable landing site for their cargo, while several fabbers I'd made vegan setting up teleported gates to allow more reinforcements to come through. If possible, I was drowning out these aliens with numbers. The gates were all I built in the Alien Dimension, though; this place would be leveled when the Dimension Gate Generator went up in smoke.
Speaking of which, the invading forces had finally reached their destination: the control chamber. XCOM had already destroyed half of the Alien City before I'd arrived, meaning that the Control Chamber was their next target. Destroying it would decapitate the aliens' commander structure, since apparently it was filled with giant brains the Micronoids used for generating strategies.
Not for much longer.
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The great minds could feel the enemy coming closer. The minds knew that they were their enemy's target. Well, this could not happen. They would not fall. The Micronoids' plan, and with it their survival, would be assured.
All around them, alien forces moved to prepare for the coming battle. Positions were taken, mines laid, and traps set. XCOM and it's allies would fail, and before they could return, the brains' armies would conquer the humans beloved city and claim Earth as their new home.
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The Assault in the Control Chamber began with a Boom running into a wall and killing tencpippers. From here, more bots moved in, followed by XCOM personnel and colonial soldiers, all trying to find the alien brains. Once they were dead, the building would be destroyed, as the brains were connected to vital points in this living structure, and killing them would kill it.
Killing the brains wasn't a problem. Reaching them, on the other hand, was, or rather, would have been: hordes of aliens guarded them, equipped with the mightiest weapons that they could carry, ready to kill us. Fortunately, I had superior number and superior firepower, and the aliens were soon messy giblets all over the walls.
As for the brains, well, I had more interesting plans for them.
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The brain recoils as it felt its compatriots fall, shot, burned, stabbed, or severed from their cords. Those that were severed, it knew would suffer the most: having no way to secure new nutrients or air, they would soon suffocate on the floor, helpless, unless they were put out of their misery. It wished all of its companions quick deaths as it felt them fade away.
One by one, the brains faded away, until only one remained. Resigned, the Alien mind opened up the eyes connected to its head and stared forward, ready to face its killer, even if it was still scared. When said killer finally arrived, it took the form of a robot wielding a sword. It came as no surprise to the mind that its death would be the severing of its support chord, condemning it to death by suffocation.
What did surprise the brain was that it soon found itself stuffed into a large glass container, filed with fluid that provided it both air and sustenance. It attempted to examinine its new prison further, only for its thoughts to be disrupted by a distant explosions, followed by a second, then a third.
Worriedly, the brain realized the building was collapsing. Now, it wondered whether it would escape before the building gave way.
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The last of the transports pulled out as the Control Chamber finally gave way, rendering the Aliens' Command and Control permanently out of commission.
While XCOM moved to recuperate it's loses, I moved the five brains I'd liberated back to Chiron for future study. Preliminary examination revealed that, like all other aliens in the Alien Dimension, they were enslaved to Micronoids, utterly unable to act on their own.
Well, I guess I'd have to fix that.
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AN: Read and Review! This is Flameal15k, signing off!