Sigma

Artificial Intelligence Program Sigma was developed for the Special Operations program Freelancer, originally assigned to Freelancer Agent Maine. It was one of many fragment constructs that were born from the degradation of the original Alpha AI, sharding off Alpha's creativity, as explained by Freelancer Washington.

Sigma was behind The Meta's rampage to kill fellow Freelancers and steal their A.I. and equipment. Sigma believed that if it brought together the A.I. fragments then he would become the Alpha, however this ultimately didn't happen since Sigma, along with all the other A.I.s captured by The Meta were destroyed in the EMP. His intentions if he had been given the chance to become the Alpha remain unknown.