There is a story, this is even the asset of the game because we have taken the universe of Stargate but we have maked a new script with a veritable intrigue.
To conclude, I would like to show you the official presentation of the game : http://sgtne.mach-creation.com/about__en.html
Yes, I understand, but this is not a whole storyline, rather a very short summary. Ofcourse you don't want to tell the whole story yet, and I don't know if there even is a storyline more than what you described here so it's hard to judge, but this is my impression of the game right now. It's not appealing to me to eagerly wait for the game to be finished, not the story nor the screenshots. It actually tells me that you haven't finished alot, and not even near to what you display on the website.
My apology if this all sound very negative, I do like the project and see potential in it (disregarding the copyright issues you will encounter :P), just telling you what I think is the down side of the project.
