Arachnid wondered the halls quietly, alone, gun in hand, helmet on. He looked like how he always did when out on missions except one difference, he wasn't fighting for his side this time but instead, the enemy side. Of course he would never do such a thing, but he didn't really have a choice, the enemies got into his mind and messed with enough things to make him hypnotized, brainwashed, however you want to put it.

So it was either kill him, be killed by him, or find out the magic word to snap him back, if there is one that is.