Sigma is a total conversion Real Time Strategy Game being developed in line with the popular Star Trek Armada II modification known as Fleet Operations.
This review may contain spoilers
This mod is by far one of the most creative mods ever made for Armada 2. Using the modified FleetOps engine allows it to do many things that the game couldn't normally do, and the universe it is created it allows for an almost limitless amount of fun. I highly recommend this mod!