It's impossible to do, I've seen videos of it, but I'm pretty sure it is because they hacked the game
They're on a ledge!!
On the outer well under the sun
NO! You could randomly construct one out of crates but it would look lame and couldn't move.
i believe the pre-packed maps for halo 3 are as follows---- guardian, sandtrap,highground, narrows, construct, epitaph, isolation, snowbound (or boundless as i think they now call it) , last resort, the pit, valhalla and that's it, those are the ones that came with halo 3.
To activate the Halo 3 Recon Skull on the Floodgate level, first, complete the mission until you reach the area with the large floodgate. Look for a small ledge on the left side of the gate, which can be accessed by jumping from the nearby structures. Once on the ledge, you'll find a series of symbols that you need to interact with in the correct order to unlock the skull. After activating the symbols, the Recon Skull will appear, allowing you to collect it.
halo 3 obviously
Halo 3: ODST is the newest of the two, but not the newest Halo game.
The halo time line goes Halo Wars, Halo: Reach, Halo:CE (halo 1), Halo 2, Halo: ODST, Halo 3. Halo 3 and ODST are practically at the same time.
After Halo 3 there was halo wars, halo 3 ODST, and Halo reach. A new company (not Bungie) will be making a Halo 4 and rumor has it there will be a remake of Halo Combat Evolved.
Halo 3 ODST is not for PC but Halo 1 and maybe Halo 2-3 are
it goes halo, halo 2, halo 3, halo 3 odst and soon halo reach will be available
Halo Games: 1. Halo: Combat Evolved (Xbox, PC) 2. Halo 2 (Xbox, PC) 3. Halo 2 Muliplayer Map Pack (Xbox) 4. Halo Triple Pack (Xbox) 5. Halo 3 (Xbox 360) 6. Halo 3 O.D.S.T (Xbox 360) 7. Halo reach (Xbox 30) Other Halo Games: 1. Halo Zero (PC) 2. Halo: Custom Edition (PC) Future Games: 1. Halo Wars (Xbox 360) 2. Halo: Chronicles (Xbox 360) 3. Halo 3: Recon (Xbox 360)4. Halo 3: ODST (Xbox 360)