A soldier should never be honored for something that was expected
When you go into co-op with a friend to do campaign,everything changes!
Say level 1,here are changes
1.No training,just immediently goes to follow the guy
2.More doors open,Some doors locked[the doors that were locked are open,and some doors like the 1 that leads to where it teaches the melee,that door becomes locked]
3.Ammo-1st,the HUD changes for ammo,and say the assault rifle,when you have 60 in a clip,to the side it says you only have 10 more ammo to reload.
4.Teleportation-if player 2 is too far away from player 1,player 2 teleports where player 1 is.
So co-op changes alot from single player,all im saying.