The Elite Bipds and the Sword are the only things from CE, the rest are stuff I did myself. Kudos to the CE guys that made those 2 things mentioned.
The Story:
You're an Elite. The higher-ups had been notified that in a certain snowy canyon, all the forces there are down with some sort of sickness. So they send the medics in. A few weeks afterward, the medics radio back, requesting "assistance" forcing the higher-ups to send them the biggest, baddest, the best person for the job. You.

Once you get there, you think it's just a boring job of treating sick grunts. It wasn't exactly as expected.

You, the other medics, and the survivors must team up and fight through the canyon and reach the Control Room.



But the infected aren't the only enemy....

Naturally, they are not siding with the zombies, so they will kill you AND the flood. Sometimes after wiping out a flood hog, a couple of spartans hop on together and try to kill you. They are a LOT better at driving than the zombies.

MOD DETAILS
As mentioned before, I tried keeping the usage of CE content to a minimum.
In this mod, you'll find most weapons have been modded in someway or another, some more than others.
-the Shotgun has been upgraded so it has a faster rate of fire, but it sprays less pellets.
-AR is more accurate
-Pistol has faster ROF
- Rocket flies faster
I also modded the AI of all the allies and enemies. They are smarter, more experienced in combat, can drive, etc, etc They basically do a lot more crap.
The grunts are also more talkative now.
The Hunter has replaced his normal fuel rod with a mini-machine gun which he has no hesitation into spraying at incoming waves of zombies.
I also messed around with the shaders of some stuff, so I gave the flood skin a more dirty, grimy feel. Same goes for the shotgun. ( It was passed down zombie after zombie generations)

Watch out for these little buggers, they no longer pop on your shield


I also added a little detail thing. Now all the characters (except floods) leave foot prints and kick snow up!

IMPORTANT NOTE
Please ONLY play this mod on Heroic or Legendary. Easy and Normal are wayyy too easy. Choose Heroic if you're just looking to have a good time, and choose Legendary if you want a bit of challenge.
Thanks for reading, I hope you have some fun! ^^
DOWNLOAD LINK:
http://www.mediafire.com/download.php?jmvzzi2gzyn
with lots of love and cookies,
sharke