in campaign it is in specific locations that you will see later in the game. you will be able to change from your recent power like running or armor lock to jet pack by pressing x when you come up to it. it will be white.
unfortunately without mods, it cannot be unlocked :L
There is no grunt ability. Just - Sprint, Hologram, Evade, Jetpack, Invisibility, and Armour Lock.
To use the jetpack you need the armour upgrade usually seen as a white hologram in an open case on the floor in campaign. Then press and hold the left bumper for Xbox (don't know about other platforms) and you should be in the air. MULTIPLAYER on multiplayer just select the class that says ranger or the one that has the spartan with a jetpack on.
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!
after Halo reach,there is no more In total, there is :Halo 1,Halo 2, Halo 3, Halo ODST, Halo wars and Halo reach
There are no skulls in Halo Reach.
halo reach is the bomb
There are two places I know that have the jetpack 1) When you go to Club Errera, got to the middle where there is a projection of the Earth (or Reach), then head forwards until you come to a bar. there should be ones there. 2) In the part when some troopers are stuck in a long hallway filled with brutes and elites, and there is a jammer at the back, go to the jammer and turn right. There should be some there.
No, Halo Reach shows what happened before Halo 1. In fact, in one of the missions in halo reach, you can see Master chief
halo,halo 2,halo 3,halo3 ODST,halo wars,halo reach
chances are no their will not be a new halo after reach