The Covenant Infection (Overhaul)

The Covenant is now a full Flood based campaign mission. Every Covenant encounter has been replaced with Flood and is completely overhauled, as well as massive tweaks to gameplay to add a fun and balanced new challenge. This is the Flood mission Halo 3 never got.

Changes: (Many not listed to prevent spoiling anything)

Characters:
ODST have had their health increased to stand a chance against heavier encounters
Elites shields have been increased by about 50%
Human and Elite Flood are now much more of a challenge to take down
Flood Tanks can now wield weapons
Infection forms take longer to infect hosts giving you more time to save them
The Scarab is now a might to be dealt with. No more easy boss battles!

Weapons: 
Assault Rifle is now much more accurate, making it more viable at medium ranges
Battle Rifle has been buffed but with an ammo nerf as otherwise it would carry you through the mission
Carbine follows the same trend as the Battle Rifle
Plasma pistol now has much faster projectile speeds
Magnum does twice as much damage and is dead accurate
Spikers have also been buffed but with ammo nerfs
Sentinal Beam no longer overheats and burns out a little slower

Vehicles:
AA Wraith no longer explodes when driver is removed
Wraiths now protect driver and have to be disabled from the cockpit or back
The Warthogs turret is more accurate and puts out more damage
Hornets missiles travel much faster
Phantoms main turret has a little more fire power 

All Encounters have been dramatically changed with their numbers increased, Characters changed and weapons held modified

This mod is balanced for Heroic Solo! If you bring more people I recommend legendary.