So last night I got one of my mates who is not very good at Halo to run through Winter Contingency on Legendary in split screen with me so I could knock out some achievements/challenges (I would normally do it over XBL with someone good, but lag is a major issue for some of my mates).
It took a while and had some moments of frustration but damn it was fun. I got the achievement for the Moa's, finishing a legendary mission without dying (and the Carter helment), not travelling in vehicles, and the weekly challenge. The last area of that level was intense with 1x Sword Ultra & 2x Concussion Rifle Elites... we managed to finish it, and I only had a sliver of health and next to no shields because when my mate died, it would spawn him next to me and the Elites would spray their rifles in the tunnel (the door closes behind you, and Jorge is useless). So I'm yelling at my mate to run out there and get away from me, he's yelling back that he'll just die again, and I'm trying to explain to him that's the point as the sword ultra enters the tunnel and comes after me... I plasma pistol'd and DMR headshot him at the very last moment - so crazy.
Eventually I had to take the controller of my mate (I asked politely a few times but he kept refusing and dying over and over). I can see why some people would prefer CoD style gameplay after last night... I could not for the life of me, explain or make him understand the concept of popping shields and THEN headshotting. He would just stand there with the PP overcharging until the ammo dried up and then hit something... and then try to PP again. His alternative strategy was to stand waaaay back (behind me - despite his only purpose to be my distraction/meat-shield) and shoot the pistol at their head... but not popping shields first.
I was basically rapid-firing the Plasma pistol from distance to kill Skirmishers etc because I had no pistol ammo and he was struggling with the concept. And for the record, he bought the game last week and finished the campaign on Normal. I have no idea how anyone can make their way through the entire game on any difficulty but easy, and not understand how shields/headshots/Plasma pistol works.
Anyway, lots of fun, and now I just need to get the Tank, Target Locator and Firefight points achievement - which I've been trying to do legit (I got 200,000 ok) but I think I will have to 'customize' my next firefight match to get the 1,000,000 achievement - that just seems impossible.