Hmm, Halo's story let me Give that to you:
1. you ran around in a giant donut weapon.
Yep, thats pretty much all of it.(Well theres some minor crap trown in but it really does not matter, hell,I dont think its even supposed to have sequel, Whats next? "Ohh, you mean where gonna fight more?!"That is so stupid, Halo could have been better I mean they should have shown you who the creators of halo where and stuff,)
Metroid's story.
1. you land on a planet read stuff, then kill stuff then collect stuff YAY! But, Why is it so damn good? Hmm, Lets look at FF shall we?
Have you ever noticed that the game has the same currency,monsters,and items?
Then why is it good? Well, Oh yeah, The story maybe thats what keeps it from being a repetive turn-based borefest.
Same whit metroid the story saves it.(Mostly anyways.......)