JHS
Enthusiast
Tutorial:
Okay so What you do is you start the mission winter Contingency and at the first checkpoint you save and quit. Then you get your savegame on you computer(usb or transfer cable)and mod it with Liberty so you have unl ammo and life and 127 grenades. then you make the savegame on your xbox start the mission and run trough all the mission till the part you have to kill the elites and grunts .Just trow al lot of plasmas at them and you should be done very fast then when your at the part you have to wait that kat opens the door just wait and when the door is open run till the very and kill the last grunts and the 2 elites ans press x at the computer(or what it is )i have don it in under 10 mins so it should be no problem.
(Dont say i copied it i posted it on a other site to so yeah)