My post appears to have disappeared 
I know I didn't get it right, but I said Natural Selection 2, the name of the screenshots!

Just messin'
You are 100% correct. This is Natural Selection 2.
The second shot is a totally new energy rifle and the third shows a Fade.
Enemies are zapped in a bright flash with this weapon....
Hahaha its not really NS2, I named the screenshots that on purpose though!
Lol, most people probably have played this game about as much as NS2(which is not released) because...
... It is an ON RAILS SHOOTER.
http://en.wikipedia.org/wiki/Rail_shooter (this game is not listed on wikipedia afaik)
They aren't too popular.
Anyways, time for some hints:
Release Date: September 1996
Developer: Rainbow Studios
Publisher: Inscape
gamespot.com has a review, and has some in-game screenshots.
Things to google include: "Necron" (main enemies, shot3) and "Project Vortex"
@Optimus: The entire game is kinda like a big movie, cutscenes and playing the game look about the same...