9
there are three levels in halo CE anniversary
There are 10 levels
10 levels
Halo Reach technically has 10 levels, one of which is just a cutscene, so 9.
13
There are 15 total campaign missions.
50 levels which will take the average person 12 hrs
Yes, there are three Easter egg levels in Halo 2
HALO Wars has the most levels. But if you're just talking about the regular first person HALOs, then HALO 2 has the most levels.
In the first game's campaign, Halo: Combat Evolved, there are 10 levels. These include: "The Pillar of Autumn', "Halo", "Truth and Reconciliation", "The Silent Cartographer", "Assault on the Control Room", "343 Guilty Spark", "The Library", "Two Betrayals", "Keyes", and "The Maw".For a complete list of all levels, multiplayer and campaign, of all the halo games, visit:http://halo.wikia.com/wiki/List_of_Halo_Levels
well what you do is beat all levels on halo 3 then you get the cool armor
There are 10 levels in the main Campaign, and there is an extra level after you beat it Called Lone Wolf, which is unbeatable, you just try to survive as long as possible. Source: http://halo.wikia.com/wiki/Halo:_Reach