Combat synthetic assigned to Kronos squad

Name: Unit 149-6A (The squad has taken to calling him Zero as a code name.)
Age: 8 (However appears around 25)
Personalty: Zero is often very straightforward, not seeing the point in trying to lighten a serious subject. He thinks in strategy; however, and plans out his actions before he makes them. But if needed he can be a spontaneous killing machine. Zero has an emotion chip programed into his system which often times interferes with his original programing; allowing more free will than its supposed to.
Equipment: Zero uses a standard M4A1 Carbine with an ACOG optical scope and M203 grenade launcher attachment. He's dressed like most soldiers, with body armor and LBE or Load Bearing Equipment. In the pouches of his LBE are two M67 Fragmentation Grenades, two AN-M14 TH3 Incendiary Grenades, one ABC-M25A2 CS Grenade, one M18 Colored Smoke Grenade, two AN-M8 HC Smoke Grenades, and seven 30 round magazines of 5.56mm ammunition. Zero also has video communication device built into his left arm and his eyes can switch between thermal, night, and ultraviolet visions.
History: Zero was manufactured by the Federations Department of Defense eight years ago as a weapon against Alien infestations. He was programed for one thing and one thing only, complete extermination of Aliens at any means necessary. However, a few years after he was built and accomplished several missions, his maintenance officer secretly installed an emotion chip into Zero's programming. He said it would allow him to make more humane judgments. After the discovery of the Alien infestation on Alpha he was assigned to Kronos squad to ensure that the mission was accomplished, but is Zero still the killing machine he was programmed for or will his emotions get in the way of completing the mission?
GAME OVER MAN!!! GAME OVER!!