The hardest is probably the recon armor and this is because you have to be or know people in bungie. The other way is for something weird to happen such as the traffic cone kill.(look it up on Google or YouTube)The final way would be to make lots of videos.
Overkill and Famine achievements are the hardest I think... that and completing the campaign on Legendary difficulty.
Its security you need 50 acheivments to unlock it
Probably A monument to all your sins, you have to beat the campaign on legendary alone. It's HARD.
u play it
Well i think not but maybe in the future when I get to a higher level...
play halo reach instead
Cheats in Xbox 360 games are Scarce, due to fairness of Achievement's. So I doubt there's any for Reach.
You get a red flame behind your helmet ^lies!
You gain achievement points for completing achievements, thus raising your gamer score.
You get an achievement and if you have halo waypoint, you get the CQB helmet. Well you actually get it on heroic but you get what I'm saying. You also get an attachment if you've completed halo 3 on legendary too. Hope this helps!
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!
halo reach is the bomb
There are no skulls in Halo Reach.
after Halo reach,there is no more In total, there is :Halo 1,Halo 2, Halo 3, Halo ODST, Halo wars and Halo reach