In the Choose Skulls section, skip selecting anything. If you're looking for the hardest challenge, play on Legendary. Bungie (the original developer) themselves said that the original game was meant to be played on Heroic. If you're not new to first-person shooters, play on Heroic. If you're new to first-person shooters in general, play on Normal difficulty. In the Choose Difficulty section, select your difficulty as you please. Enable Campaign Customization = Disabled (default) In the game Choose Options section, select the following options:
In the Choose Mission section, select the first mission, The Pillar of Autumn. Go to Main Menu > Campaigns > Halo: CE Anniversary > Missions
