No. You are given choices as to what classes, or "loadouts" you can use. They are pre-made.
YES! Halo reach has a "Forge" feature, which allows players to create maps, the reccomended map is forge world.
Halo: Reach comes with a built-in map editor called Forge Mode. You can access this from the main menu of Reach.
practice practice practice :)
The same as ALL PREVIOUS Halo games, Xbox. Well....the Xbox 360 to be precise.
if you mean play as aliens you can in halo2,3 and halo reach
armour lock. if your playing on hamorhage
The only playable alien race in the Halo franchise are the Elites. You can not play as the Brutes in Reach or any of the other games, with the exception of Halo Wars allowing you to create Brute units.
No you can't create your own missions. The closest thing to that is Forge.
on halo reach you go to main menu and select forge and then select your map there start building your own map and i recommend forge world
Halo reach is older
no, Masterchief is not in Halo: Reach. Halo: Reach is set before the discovery of Halo, if you have or Know about the Halo book: The Fall of Reach, it is a closer view of the plant reach. but there are some other Spartans in it!
There are no skulls in Halo Reach.