You can do it fast by using it on normal with thunderstorm tough luck catch fog cowbell grunt birthday and that one that makes them say more stuff no other skull coma nation will do this I've tried and my gamer tag is civicmallard3 and if you don't belive me check my gamer score you will see all of them no joke
Kill things =]
and the kill things is the old answer hope this helps:)
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.
Halo Reach technically has 10 levels, one of which is just a cutscene, so 9.
There are 15 total campaign missions.
Be player 2 in the halo 3 co-op campaign. Or, play the Arbiter levels in halo 2.
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
50 levels which will take the average person 12 hrs
No, the skulls are found in the campaign levels on the normal difficulty or higher
You get some bycompleting campaign levels, but in the campaign you can find black boxes that might get you some more of the time lines.
If by "halo 3 maps" you mean the Halo 3 Heroic, Legendary, Mythic and Cold Storage maps, then yes. However to play campaign levels, you must actually advance in the game to get to them.
score 15,000 or more points on crows nest with campaign scoring on
Yes, you play as the Arbiter in certain halo 2 campaign levels. I believe there are mods too. You can also select Elita as a character model in halo 2 multiplayer.
Just beat all the levels on normal difficulty