Hardest Halo: Reach Achievements

This achievement is seriously impossible. You can't describe how extremely hard this is until you try it. I mean beating the campaign on heroic was a pain in the ass but trying to beat it on legendary is going to kill me.

I could probably beat the first few missions on legendary in about a few months but I will never beat Exodus on legendary alone.

Completed every mission in Halo: Reach alone, on Legendary.

This achievement can be pretty hard, but if you analyze the movements of the Elite that you're going for (I did the one on the Pillar of Autumn), wait for it to stand still, aim your jump well, and press the action button on time, it's not too difficult...you just gotta make up a quick strategy. Don't get me wrong, though, it took me at least 5 tries to do it...

Come on. I beat it on mythic, alone, so the monument to all your sins achievement is easier than this. If they came to hear me beg has to be the hardest, since it's a glitch-ish achievement, and is almost too difficult to pull off.

You noobs who can't beat Reach on solo Legendary need to rethink your strategies. Assassinating an Elite to survive a lethal fall is far more difficult, especially due to a glitch.

Performed an Assassination against an Elite to survive a fall that would've been fatal.

Now does this mean to keep the tank still functional? Or to not take any damage on it?

Finished the 9th mission on Legendary with the Scorpion intact.

Scored 1,000,000 points in a Firefight game.

Completed the Campaign on Legendary difficulty.

Destroyed the Corvette's engines & escort in under 3 minutes in the 6th mission on Heroic or harder.

Killed 2 vehicles at once with the Target Locator in the 3rd mission.

Completed the Campaign on Heroic difficulty.