From Halopedia, the Halo wiki
Finally finishing the Annual vidmaster in Halo3. Took 2 hours, and alot of yelling at one person (not me) and it had so happened i had Halo3 for only 3 days, and it was my first legendary mission.
Halo Wars mission 4, Arcadia City on legendary. took all day, and i despise that mission.
I am the Sciene person, i actually call the AR by its name, Ma5B or Ma5C