Which FPS series has the best single player campaign?

[Dr.Grass]

amp316 said:

Dr.Grass said:

curl-6 said:
The Metroid Prime trilogy.

 

Not an FPS. Not even close.

See what I mean?  People don't consider it a FPS even though you shoot thousands of aliens with a laser beam.

FIRST PERSON SHOOOOOOOOOOOOTER

That's an insult to Metroid Prime right there.