Ok, for the SWORD IN THE STONE, well, its a little difficult to explain. I can't give you guys exact directions, but I can give you a general idea on where it is. I'll be as precise as I can, but don't expect exact details. Just do some exploring; you'll find it! (its really nothing special)Try to play the game as you are reading these directions or else it will get confusing.
'Here goes: Alright well, the sword in the stone (my nickname for it) is in the level Outskirts. I don't think it matters what difficulty you play it on, but I did it on Heroic.
Do you guys all know the part in the level where you get new marines? The part where Commander Keyes talks to Sergeant Johnson over the radio? The very same part where the Marine says "Jackals with Sniper Rifles."? Yeah, its that part right after it, when you need to take down a bunch of covenant snipers and buggers. It is at the entrance to that open space.
Hmm... here's the part where it gets difficult to explain. Ok, you need to jump on top of a grey metal dumpster thing that is against a wall. From there you can jump on a small orange rooftop. Turn completely around (so that you are facing out toward the open), and jump on a small metal gutter-like pipe thing that is against the wall. When on top of this pipe, you can jump out on top a bigger roof. (you'll need to jump OVER the alley way between the two buildings.)Turn right and look where those Covenant Snipers would be. Walk that way and look across the alley way again. I think you will see a building that is slightly destroyed (as in it has sections blown out of it by an explosion)
I'm writing this all on memory, and it gets blurry from here on out. I'm pretty sure that the Sword in the Stone is inside that destroyed building. I can't remember how to get inside,; you'll just have to be creative. Use the crouch jump or grenade jump whenever possible to get inside.
It's really nothing special. Is is only a sword that is sticking out of the ground inside this building. But, I thought it was cool.
Please send messages telling me if my directions were clear enough. If not, I'll go back and play Halo 2 and try to write better ones. Thanks!