I making a plug-in called Total Annihilation. Here's the plot as of now, give me your opinion, comments etc.
Prologue
Long before mankind landed on Mars, before the Ishiman, Elejeetian or even the mighty Salrilians visited another system, there were the Oblitgeron. A powerful race from the other side if the galaxy, bent on total annihilation of all other sentient beings in the galaxy.
In 2015 Earth time the Cantharans, Salrilians, Audemedons and Gaitori decided to declare war on the rest of the galaxy. In 2016 the Ishimans sent the Humans a message, the Humans built their first interstellar ship (the Apollo) to find the source of the transmission. It was slow however and when they reached Ishima Earth had been taken. The Humans would not accept this however and the Ishiman gave them the technology to fight back, they were successful.
In the mist of all this the Oblitgerons sent scouts to our sector of the galaxy, the scouts went unnoticed due to the war. The Oblitgerons decided to wait until after the war to attack, when their pray would be wounded.
Part 1
With the recapture of Earth and the defeat of the Cantharans the new Alliance was born, a new protection for this part of the galaxy. With the Cantharan threat behind them the Alliance began designing a new ship to explore the rest of the galaxy. Knowing there would be unknown danger they designed a more powerful ship than anything before. It would also have new breakthrough in gate technology, a hypergate generator. With it you could travel from one side of the galaxy to the other in a few days instead of years.
The new ship would be called, the Battlestar Galactica. The remaining Salrilians learned of the new design, and with the help of their stealth device stole a copy of the plans. It is now a race to finish the Battlestar first, and there is no prize for last place.
The missions in part 1 will be mostly destroy the enemy fleet or get this component (sometimes from an enemy transport) or protect the unfinished Galactica or sometimes destroy enemy transport carrying this component. In the end both Battlestars get built. There is a big battle at Ishima as the last mission of part 1 that is interrupted by the Oblitgeron jumping in. The Alliance and the Salrilians team up against the Oblitgeron but the Salrilian Battlestar gets destroyed and both are forced to retreat (you may be saying how is that mission hard if you retreat? well just try staying alive that long!).
Part 2
Both the Alliance and Salrilians retreat to a hidden Ishiman base. An emergency meeting is called by the military leader of the Ishiman, General <nonameyet>.
It was found out that Salril, Audemedon and Ishima, where the first to be taken. Also the Oblitgerons activated a sector wide hypergate inhibiter. The Alliance (and the Salrilians) decided they will try to capture a Oblitgeron ship and use it to learn about them and they're technology. Although it would give them an advantage, it was still unlikely they would even come close to winning.
The missions in part 2 will be stuff like destroy the enemy fleet of death and capture an Oblitgeron ship and protect planet while evacuating civilians and in the last mission of part 2 you attempt to recapture Audemedon Prime, but are forced to retreat again.
I don't have the rest of the plot yet cuz I want your opinions first.